| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1888 | 22.92 | 37.31 | 38.63 | 55.05 | 57.56 | 63.53 | n | 69.95 | 69.02 | 67.62 | 51.65 | 36.90 | 28.97 | 48.69 | a | |||||||||||
| 1889 | 24.23 | 30.25 | 40.44 | 51.00 | 56.48 | 67.48 | 74.74 | 71.61 | 67.39 | u | 38.93 | q | 45.50 | 37.63 | 49.94 | b | ||||||||||
| 1890 | 21.17 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.73 | 64.31 | 57.20 | 40.35 | 33.15 | 29.81 | 49.26 | f | ||||||
| 1891 | 26.60 | b | 25.62 | c | 36.84 | 45.37 | 53.45 | 59.57 | a | 71.44 | 73.15 | 60.64 | s | 54.19 | 46.35 | 27.58 | a | 47.29 | a | |||||||
| 1892 | ----- | z | 36.02 | b | 42.81 | 48.28 | a | 56.22 | f | 65.89 | b | 74.00 | a | 76.16 | f | 68.37 | g | 53.18 | 42.55 | h | 30.05 | 50.03 | e | |||
| 1893 | 38.52 | d | 33.91 | a | 39.05 | a | 47.12 | i | 56.67 | a | 68.31 | d | 72.39 | 72.71 | c | ----- | z | 51.19 | d | ----- | z | ----- | z | 54.09 | d | |
| 1894 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1895 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1896 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1897 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1898 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1899 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1900 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1901 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1902 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1903 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1904 | 30.00 | y | 37.46 | a | 43.78 | b | 47.55 | a | 55.85 | a | 65.30 | 70.48 | b | 68.76 | 60.50 | 46.66 | 40.15 | 28.52 | 51.36 | a | ||||||
| 1905 | 28.78 | a | 29.76 | a | 36.82 | 44.97 | 48.89 | 63.81 | a | 72.03 | a | 70.63 | 60.22 | ----- | z | 34.53 | 23.13 | 46.69 | a | |||||||
| 1906 | 25.60 | b | 33.66 | 33.37 | 42.27 | 51.77 | 62.10 | 74.53 | 72.65 | a | 63.97 | 54.13 | a | 35.82 | 31.92 | 48.48 | ||||||||||
| 1907 | 24.72 | b | 39.48 | 39.18 | a | 52.12 | b | 54.38 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.98 | g | |
| 1908 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1909 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1910 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1911 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1913 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1914 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.80 | a | 41.24 | c | 32.14 | q | 49.02 | j |
| 1916 | 27.55 | 37.53 | 43.23 | 49.88 | 54.94 | 66.08 | 70.48 | 68.02 | 61.38 | 45.12 | a | ----- | z | ----- | z | 52.42 | b | |||||||||
| 1917 | ----- | z | 31.71 | d | ----- | z | 43.33 | 50.05 | 66.37 | 74.34 | 68.92 | 61.28 | 52.79 | 44.24 | a | 41.15 | 53.42 | b | ||||||||
| 1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1919 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1939 | 30.05 | 24.27 | 42.23 | 51.87 | 58.85 | 67.07 | 75.44 | 75.15 | 62.78 | 51.19 | 45.78 | 39.47 | 52.01 | |||||||||||||
| 1940 | 33.71 | 34.38 | 44.22 | a | 50.03 | a | 62.27 | 72.13 | 74.47 | 74.95 | 61.30 | 53.94 | 38.48 | 34.77 | 52.89 | |||||||||||
| 1941 | 32.89 | 38.20 | 39.90 | 41.62 | 57.71 | 63.47 | 71.74 | 67.77 | 58.20 | 45.98 | 42.13 | 32.27 | 49.32 | |||||||||||||
| 1942 | 31.31 | 30.00 | 37.72 | a | 47.65 | 54.15 | a | 69.12 | 76.89 | 71.98 | 64.53 | 54.42 | 42.10 | 38.71 | 51.55 | |||||||||||
| 1943 | 34.63 | 38.04 | 41.68 | 52.97 | 58.44 | 62.58 | 73.53 | 70.56 | 67.03 | 52.94 | 42.87 | 33.97 | 52.44 | |||||||||||||
| 1944 | 29.55 | c | 31.11 | a | 36.58 | 44.86 | b | 56.05 | b | 61.32 | 72.65 | 73.38 | a | 66.82 | 55.58 | 36.91 | a | 35.31 | 50.01 | |||||||
| 1945 | 34.16 | 34.02 | 36.27 | 45.78 | 56.89 | 63.41 | a | 74.35 | 69.79 | 64.00 | 53.31 | 39.70 | 31.55 | a | 50.27 | |||||||||||
| 1946 | 30.60 | 34.00 | 40.03 | 51.38 | 56.34 | 68.03 | 73.13 | 72.98 | 64.78 | 45.30 | a | 36.07 | 36.08 | 50.73 | ||||||||||||
| 1947 | 29.92 | 40.18 | 44.84 | 48.00 | 60.68 | 62.37 | 72.94 | 70.37 | 67.78 | 53.34 | b | 34.20 | 28.81 | 51.12 | ||||||||||||
| 1948 | 33.74 | 30.84 | a | 31.90 | a | 48.75 | 57.29 | 64.62 | 74.00 | 70.60 | 66.65 | 53.15 | 35.82 | 25.72 | d | 49.42 | ||||||||||
| 1949 | 18.11 | 26.14 | 38.85 | 54.38 | 54.79 | 66.15 | 73.35 | 71.06 | 65.95 | 49.97 | 48.67 | 30.39 | 49.82 | |||||||||||||
| 1950 | 27.06 | 38.16 | 41.03 | 51.33 | 56.63 | 66.65 | 72.65 | 72.15 | 63.12 | 58.15 | 44.58 | 39.66 | 52.60 | |||||||||||||
| 1951 | 30.87 | 34.96 | 38.11 | 49.35 | 56.77 | 66.45 | 74.66 | 70.26 | 66.37 | 51.24 | 38.22 | a | 28.56 | 50.49 | ||||||||||||
| 1952 | 27.81 | 31.71 | 32.77 | 48.67 | a | 58.92 | 64.53 | 74.02 | 74.26 | b | 66.12 | 59.66 | 35.98 | 31.90 | 50.53 | |||||||||||
| 1953 | 38.84 | 35.80 | 42.50 | 47.40 | a | 50.03 | 65.85 | 75.40 | 71.71 | 67.83 | 52.50 | a | 43.40 | 31.97 | 51.94 | |||||||||||
| 1954 | 31.92 | 40.89 | a | 36.93 | a | 53.13 | 61.68 | 65.28 | 74.79 | 70.16 | 63.47 | 53.44 | 44.35 | 31.47 | 52.29 | |||||||||||
| 1955 | 24.39 | 26.84 | 37.52 | 43.57 | 55.92 | 65.86 | a | 71.39 | 70.82 | 64.30 | 55.06 | 39.53 | 35.63 | 49.24 | ||||||||||||
| 1956 | 36.89 | 30.55 | a | 41.92 | 47.55 | 57.69 | 69.52 | a | 72.55 | 70.77 | 67.97 | 51.75 | a | 40.20 | 36.73 | 52.01 | ||||||||||
| 1957 | 27.95 | 39.52 | 41.80 | a | 46.20 | 52.21 | 67.82 | 72.87 | 71.03 | 64.72 | 49.37 | 34.05 | 35.92 | 50.29 | ||||||||||||
| 1958 | 33.97 | 38.29 | 34.60 | 45.05 | 59.47 | 66.15 | 71.53 | 75.03 | 64.68 | 55.60 | 41.05 | 40.60 | 52.17 | |||||||||||||
| 1959 | 34.66 | 32.23 | 41.43 | a | 51.62 | 55.11 | 70.10 | 77.23 | 71.02 | 60.72 | 54.34 | 42.85 | 34.03 | 52.11 | ||||||||||||
| 1960 | 25.69 | 29.20 | a | 43.69 | 50.52 | a | 56.76 | 70.15 | 75.29 | 72.03 | 66.62 | 50.74 | 38.95 | 33.98 | 51.14 | |||||||||||
| 1961 | 34.32 | 35.59 | 39.26 | 47.50 | 55.34 | 70.90 | 74.06 | 71.00 | 59.47 | 49.73 | 36.27 | 30.65 | 50.34 | |||||||||||||
| 1962 | 29.70 | a | 35.21 | 34.76 | 52.43 | 53.79 | 65.78 | 71.10 | 72.26 | 65.80 | 54.89 | 45.42 | 36.95 | 51.51 | ||||||||||||
| 1963 | 30.10 | 41.71 | 37.13 | 41.95 | a | 60.16 | 62.90 | 72.92 | 70.77 | a | 66.55 | 55.97 | 40.45 | 33.34 | 51.16 | |||||||||||
| 1964 | 28.45 | a | 30.67 | 34.85 | 44.10 | 53.92 | 63.27 | 74.42 | 71.21 | 61.87 | 58.31 | 36.35 | 31.58 | 49.08 | ||||||||||||
| 1965 | 35.35 | 35.79 | 37.39 | 45.47 | a | 52.35 | 62.28 | 70.82 | 69.81 | 57.15 | 57.61 | 42.62 | 31.13 | 49.81 | ||||||||||||
| 1966 | 28.69 | 28.82 | 42.81 | 49.83 | 61.10 | 67.07 | 73.40 | 74.05 | 64.92 | 52.65 | 42.72 | 33.03 | 51.59 | |||||||||||||
| 1967 | 32.15 | 35.71 | 41.89 | 38.50 | 55.23 | a | 61.45 | 73.94 | 72.69 | 63.88 | 55.68 | 44.28 | 27.37 | 50.23 | ||||||||||||
| 1968 | 32.71 | 40.72 | 42.15 | 44.52 | 56.24 | 67.78 | 72.98 | 66.85 | 62.98 | 53.29 | 39.78 | 28.66 | 50.72 | |||||||||||||
| 1969 | 34.50 | 30.98 | 35.68 | 48.65 | 61.61 | 62.48 | 73.11 | 75.84 | 66.13 | 47.18 | 41.35 | 33.93 | a | 50.95 | ||||||||||||
| 1970 | 33.05 | 39.25 | 37.40 | 41.97 | 58.32 | 66.52 | 73.02 | a | 71.82 | 60.22 | 49.87 | 40.93 | 30.08 | 50.20 | ||||||||||||
| 1971 | 32.68 | 35.27 | 39.77 | 46.72 | 50.69 | 66.58 | 75.27 | 72.35 | 60.17 | 47.32 | 37.40 | 25.90 | 49.18 | |||||||||||||
| 1972 | 30.45 | 38.76 | 48.70 | a | 48.15 | 58.11 | 67.15 | 75.76 | 69.95 | 61.30 | 48.19 | 34.69 | a | 27.18 | 50.70 | |||||||||||
| 1973 | 26.69 | 33.23 | 33.62 | a | 44.38 | 58.58 | a | 66.48 | 73.42 | 71.48 | 62.07 | 53.06 | 38.73 | 33.74 | 49.63 | |||||||||||
| 1974 | 26.63 | 32.30 | a | 42.52 | a | 46.12 | 60.55 | a | 71.65 | 72.53 | 71.19 | 66.43 | 51.69 | 40.48 | 30.13 | a | 51.02 | |||||||||
| 1975 | 31.73 | 32.45 | 35.52 | a | 38.76 | a | 52.32 | 64.45 | b | 72.55 | 69.16 | 64.33 | 50.79 | 38.57 | a | 35.35 | 48.83 | |||||||||
| 1976 | 34.37 | 37.00 | 37.08 | 44.68 | 59.00 | 65.27 | 73.23 | 67.95 | 62.15 | 50.84 | 44.78 | 36.31 | 51.05 | |||||||||||||
| 1977 | 30.47 | 38.95 | 35.66 | 51.66 | a | 49.50 | b | 68.85 | j | 73.15 | 71.61 | 63.16 | a | 55.00 | 43.00 | a | 37.11 | 49.93 | a | |||||||
| 1978 | 32.65 | 34.87 | a | 42.98 | 44.43 | 54.08 | 66.47 | 73.08 | 70.84 | 60.25 | 56.53 | 37.55 | 28.08 | 50.15 | ||||||||||||
| 1979 | 24.45 | 32.43 | 38.06 | 47.67 | 56.55 | 65.34 | a | 72.61 | 68.42 | a | 67.90 | 55.76 | 36.88 | 37.29 | 50.28 | |||||||||||
| 1980 | 34.02 | b | 37.98 | 36.86 | b | 48.02 | 50.89 | 64.08 | 73.08 | a | 70.63 | 63.52 | 53.29 | 42.75 | 40.91 | c | 51.34 | |||||||||
| 1981 | 36.48 | 36.82 | 38.71 | 51.50 | 54.85 | d | 71.05 | 75.56 | 73.10 | 64.83 | 48.17 | a | 43.48 | a | 37.42 | 52.67 | ||||||||||
| 1982 | 30.11 | 35.18 | 36.79 | b | 45.46 | b | 55.08 | 63.16 | a | 70.97 | 71.47 | 60.67 | 47.02 | 36.25 | 30.84 | 48.58 | ||||||||||
| 1983 | 34.27 | 35.14 | 38.87 | 40.87 | 53.79 | 64.40 | a | 71.24 | 69.24 | 65.20 | 52.83 | a | 38.87 | 33.73 | 49.87 | |||||||||||
| 1984 | 33.63 | 35.19 | 41.12 | b | 44.80 | 62.87 | a | 65.29 | a | 72.11 | 70.11 | 64.85 | 46.40 | a | 38.79 | a | 29.65 | a | 50.40 | |||||||
| 1985 | 28.26 | 30.72 | a | 38.08 | 53.05 | 57.98 | 70.20 | 74.77 | a | 72.79 | 59.50 | 51.47 | 36.24 | c | 36.02 | a | 50.76 | |||||||||
| 1986 | 40.00 | 38.12 | 45.79 | 48.23 | 58.29 | 70.08 | 70.42 | 74.13 | 57.98 | 49.95 | 41.78 | 35.23 | 52.50 | |||||||||||||
| 1987 | 29.84 | 34.79 | 38.90 | 53.15 | 57.02 | 69.13 | 70.53 | 71.79 | 65.72 | 56.92 | 39.45 | a | 28.79 | 51.34 | ||||||||||||
| 1988 | 30.27 | 38.12 | a | 40.44 | 48.30 | b | 55.56 | d | ----- | z | ----- | z | 71.35 | k | 62.87 | 60.34 | 40.60 | 30.48 | 45.22 | c | ||||||
| 1989 | 28.72 | a | 32.70 | a | 46.92 | 55.42 | 57.50 | 66.58 | e | 77.59 | d | 69.55 | b | 64.69 | a | 52.02 | a | 44.02 | 36.40 | j | 54.15 | a | ||||
| 1990 | 33.46 | g | 33.76 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.76 | k |
| 1991 | ----- | z | 41.52 | a | 35.60 | b | 46.86 | e | 52.02 | 63.40 | d | 74.82 | l | ----- | z | ----- | z | 54.67 | b | 39.73 | d | 34.41 | b | 46.03 | d | |
| 1992 | 31.00 | 37.86 | a | 41.47 | a | 53.10 | f | 59.93 | b | 58.00 | j | 69.76 | b | 74.50 | b | 65.36 | a | 58.45 | k | 38.20 | c | 27.40 | e | 49.50 | c | |
| 1993 | 28.78 | b | 31.02 | c | 43.44 | m | 47.89 | b | 58.11 | 60.79 | a | 70.52 | 70.24 | 64.12 | d | 52.32 | a | 37.48 | a | 32.35 | 50.33 | a | ||||
| 1994 | 37.95 | a | 31.54 | b | 45.61 | 49.00 | 58.93 | h | 66.91 | a | 68.38 | b | 73.79 | b | 65.43 | a | 46.56 | 27.80 | g | 31.65 | a | 51.68 | b | |||
| 1995 | 30.52 | f | 44.12 | d | 39.17 | h | 44.08 | e | 50.87 | d | 61.08 | e | 72.78 | b | 73.70 | a | 65.82 | b | 54.73 | p | 47.63 | k | 38.12 | c | 56.32 | d |
| 1996 | 34.68 | c | 35.74 | f | 44.80 | c | 52.78 | e | 61.34 | 70.95 | a | 75.63 | 74.60 | 63.35 | 56.20 | a | 44.12 | 35.98 | c | 55.86 | a | |||||
| 1997 | 33.59 | h | 35.40 | d | 46.06 | f | 44.44 | e | 61.40 | e | 64.10 | a | 71.33 | e | 70.93 | c | 62.65 | c | 51.00 | f | 42.34 | e | 31.90 | e | 53.83 | c |
| 1998 | 36.39 | d | 32.72 | e | 39.65 | g | 43.31 | d | 49.71 | b | 59.50 | d | 71.59 | b | 71.55 | b | 60.00 | a | 48.52 | d | 41.76 | e | 35.40 | g | 51.50 | b |
| 1999 | 36.85 | d | 37.02 | g | 39.89 | i | 39.96 | f | 51.83 | h | 65.33 | c | 69.72 | b | 69.45 | b | 63.13 | d | 58.38 | g | 50.40 | j | 37.54 | f | 60.90 | g |
| 2000 | 39.10 | e | 39.85 | f | 41.69 | b | 52.68 | h | 61.48 | f | 70.00 | d | 75.29 | c | 72.45 | b | 65.76 | a | 49.66 | i | 35.29 | a | 39.52 | a | 54.89 | d |
| 2001 | 36.73 | e | 33.43 | g | 43.92 | g | 45.25 | f | 64.27 | g | 71.48 | i | 72.93 | a | 74.63 | d | 67.35 | d | 57.65 | g | ----- | z | 31.29 | g | 62.91 | h |
| 2002 | 32.98 | h | 36.35 | h | 42.43 | j | 52.82 | e | 59.22 | d | 70.62 | e | 77.85 | e | 75.53 | b | 67.25 | d | 53.88 | b | 42.25 | d | 34.90 | 59.37 | c | |
| 2003 | 43.29 | 36.96 | 42.79 | 44.37 | 58.53 | 67.95 | 77.94 | 70.94 | 65.60 | 57.56 | 39.08 | 34.79 | 53.32 | |||||||||||||
| 2004 | 32.73 | 32.19 | 48.13 | 48.09 | g | 57.84 | 68.23 | 74.40 | 72.29 | 63.05 | 51.15 | 43.77 | b | 37.67 | b | 52.86 | a | |||||||||
| 2005 | 35.71 | e | 36.56 | b | 40.48 | a | 45.08 | 58.16 | 64.43 | a | 78.76 | 70.71 | l | 61.46 | r | 53.00 | n | 42.57 | o | 36.59 | o | 51.31 | e | |||
| 2006 | 35.83 | k | 38.98 | h | 40.14 | q | 49.62 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.91 | t | 43.83 | 26.30 | a | 35.07 | j | |
| 2010 | 31.37 | 32.87 | b | 39.44 | 45.47 | a | 50.64 | b | 66.78 | 76.00 | a | 70.66 | 66.25 | 52.92 | 37.47 | 34.90 | 50.40 | |||||||||
| 2011 | 31.26 | 31.67 | a | 39.72 | d | 45.72 | 51.34 | 64.55 | 71.95 | 73.16 | 66.05 | 53.03 | 38.13 | 32.38 | a | 49.91 | ||||||||||
| 2012 | 35.06 | 34.17 | 41.56 | 50.22 | 60.02 | 69.87 | 72.84 | 73.23 | 65.88 | 54.26 | 44.38 | 30.65 | 52.68 | |||||||||||||
| 2013 | 27.76 | 33.12 | 45.03 | 49.00 | 57.23 | 71.18 | 75.61 | 71.11 | 62.02 | 49.00 | 41.00 | 29.94 | 51.00 | |||||||||||||
| 2014 | 38.60 | 38.82 | 42.82 | 49.57 | 58.18 | 69.23 | 75.71 | 68.92 | 66.17 | 56.63 | 42.45 | 34.29 | 53.45 | |||||||||||||
| 2015 | 37.48 | f | 42.23 | m | 47.10 | 48.80 | 54.10 | 70.85 | 70.21 | c | 72.87 | 67.70 | 56.98 | 36.41 | c | 29.65 | 55.47 | b | ||||||||
| 2016 | ----- | z | ----- | z | ----- | z | 48.25 | b | 54.52 | 71.88 | 74.29 | 74.32 | f | 66.57 | ----- | z | ----- | z | ----- | z | 63.10 | g | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 31.60 | 34.63 | 39.96 | 47.63 | 56.19 | 66.27 | 73.31 | 71.45 | 63.90 | 52.45 | 40.21 | 32.91 | 50.86 | |||||||||||||
| S.D. | 4.49 | 3.94 | 3.72 | 3.73 | 3.39 | 3.10 | 2.11 | 2.12 | 2.76 | 3.76 | 3.45 | 4.00 | 1.22 | |||||||||||||
| SKEW | -0.13 | -0.20 | 0.14 | -0.09 | -0.27 | -0.03 | 0.25 | -0.32 | -0.57 | -0.50 | 0.02 | 0.03 | 0.15 | |||||||||||||
| MAX | 43.29 | 44.12 | 48.70 | 55.42 | 62.87 | 72.13 | 78.76 | 75.84 | 67.97 | 60.34 | 48.67 | 41.15 | 53.45 | |||||||||||||
| MIN | 18.11 | 24.27 | 31.90 | 38.50 | 48.89 | 59.50 | 68.38 | 64.31 | 57.15 | 40.35 | 33.15 | 23.13 | 48.48 | |||||||||||||
| YRS | 75 | 78 | 75 | 78 | 79 | 78 | 82 | 79 | 78 | 75 | 77 | 77 | 55 | |||||||||||||