| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1893 | 21.18 | 28.12 | 33.79 | 42.50 | 54.94 | 63.82 | 69.65 | 68.66 | 58.28 | 53.13 | 40.97 | 32.55 | 47.30 | |||||||||||||
| 1894 | 31.08 | 26.23 | 41.13 | 44.60 | 55.84 | 65.88 | 72.19 | 66.16 | 64.43 | 53.50 | 39.35 | 33.19 | b | 49.47 | ||||||||||||
| 1895 | 28.53 | 24.09 | a | 34.97 | 44.10 | 56.50 | 66.12 | 67.18 | 69.69 | 64.83 | 48.29 | 45.13 | 35.39 | 48.74 | ||||||||||||
| 1896 | 24.81 | 29.60 | 31.94 | 46.17 | 58.61 | 63.78 | 71.08 | 69.66 | 61.87 | 49.65 | 46.87 | 29.00 | 48.59 | |||||||||||||
| 1897 | 27.98 | 30.14 | 36.81 | 46.30 | 55.97 | 61.32 | 70.66 | 67.82 | 61.80 | 52.58 | 42.12 | 34.81 | 49.03 | |||||||||||||
| 1898 | 29.31 | 31.36 | 40.32 | 43.40 | 54.18 | 63.87 | 70.16 | 71.13 | 64.80 | 53.63 | 41.27 | 31.69 | 49.59 | |||||||||||||
| 1899 | 29.97 | 25.21 | 35.71 | 45.52 | 54.89 | 67.77 | 70.11 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.03 | e | |||||||
| 1900 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1901 | 28.60 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.03 | 69.80 | c | 63.09 | a | 50.35 | a | 35.48 | c | 30.93 | b | 50.18 | e | |
| 1902 | 28.61 | i | 28.80 | h | 40.88 | c | 45.92 | x | 56.23 | a | 63.03 | a | 66.95 | b | 66.71 | 62.43 | 53.06 | 46.15 | 30.59 | b | 54.00 | c | ||||
| 1903 | 28.76 | 30.46 | 42.52 | 47.07 | 57.71 | 59.65 | 69.74 | 64.03 | 61.62 | 53.44 | 39.20 | b | 27.03 | b | 48.44 | |||||||||||
| 1904 | 21.71 | 22.70 | b | 33.98 | b | 42.73 | 57.65 | 61.62 | 68.58 | 66.27 | 60.22 | 48.47 | 36.33 | 25.00 | 45.44 | |||||||||||
| 1905 | 24.47 | a | 21.27 | b | 35.00 | a | 45.98 | 55.57 | a | 62.70 | 71.06 | 67.03 | b | 61.22 | 53.50 | 41.40 | 35.02 | 47.85 | ||||||||
| 1906 | 35.52 | d | 30.66 | 33.11 | 47.23 | 57.78 | b | 66.70 | 70.79 | 72.89 | 64.85 | 54.66 | 42.16 | b | ----- | z | 52.40 | a | ||||||||
| 1907 | 20.75 | q | 22.57 | f | 37.63 | 42.50 | 51.40 | 63.03 | 71.76 | 69.47 | 65.14 | b | 49.93 | b | 44.92 | d | 37.28 | b | 53.31 | b | ||||||
| 1908 | 31.95 | b | 29.64 | g | 39.20 | h | 45.62 | 58.73 | 67.78 | 72.90 | a | 68.67 | e | 63.73 | 55.29 | c | 43.31 | a | 32.15 | 54.01 | b | |||||
| 1909 | ----- | z | 30.61 | 33.33 | d | 43.27 | d | 55.89 | c | 67.60 | 70.92 | 69.94 | 64.16 | e | 53.24 | b | 47.32 | 30.95 | b | 51.57 | a | |||||
| 1910 | 32.55 | 30.18 | 39.50 | b | 50.27 | 56.69 | 64.92 | 72.79 | 68.37 | 61.90 | a | 54.50 | 40.50 | 26.27 | 49.87 | |||||||||||
| 1911 | 31.66 | b | 27.70 | e | 33.03 | 44.15 | 59.78 | b | 66.00 | 73.84 | 69.24 | 61.95 | 52.44 | 41.88 | 38.90 | 50.05 | ||||||||||
| 1912 | 22.37 | 27.24 | 36.52 | b | 47.02 | b | 56.50 | 65.60 | 71.56 | 67.55 | 61.42 | 56.21 | 43.83 | a | 38.47 | b | 49.52 | |||||||||
| 1913 | 39.16 | 28.61 | f | 39.72 | b | 47.71 | b | 54.53 | b | 64.98 | 71.82 | 67.10 | f | 59.27 | 54.20 | p | 48.43 | b | 41.88 | o | 53.20 | d | ||||
| 1914 | 30.72 | a | 26.57 | e | 36.34 | 44.10 | 58.16 | 65.80 | b | 67.39 | 68.98 | 62.58 | 55.77 | 42.25 | b | 31.62 | f | 50.79 | a | |||||||
| 1915 | 30.60 | g | 33.37 | b | 34.72 | b | 49.27 | 54.47 | 63.04 | b | 69.65 | 67.60 | 65.28 | 53.35 | g | 39.89 | u | 33.13 | 52.28 | c | ||||||
| 1916 | 34.67 | b | 27.59 | b | 31.16 | 45.27 | 57.26 | 62.57 | 71.14 | c | 71.05 | b | 63.88 | 55.19 | b | 45.29 | k | 31.98 | a | 50.16 | a | |||||
| 1917 | 32.17 | h | 26.37 | a | 36.13 | 43.28 | 49.67 | a | 64.73 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.04 | g | |||
| 1918 | 24.97 | n | 30.33 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.33 | k |
| 1919 | 32.85 | 31.93 | 40.03 | 46.96 | d | 61.00 | b | 68.80 | 74.26 | 67.95 | 63.37 | 56.48 | 42.68 | 28.79 | 51.26 | |||||||||||
| 1920 | 22.98 | b | 27.39 | b | 38.50 | c | 45.84 | a | 54.98 | 65.35 | 72.10 | a | 73.06 | ----- | z | 57.88 | b | 42.40 | a | 34.86 | c | 48.67 | a | |||
| 1921 | 30.74 | h | 31.64 | 44.19 | 49.55 | 55.79 | 66.45 | 72.60 | a | 67.48 | 66.90 | e | 52.32 | a | 41.50 | b | 30.55 | b | 52.63 | a | ||||||
| 1922 | 26.02 | b | 30.33 | a | 38.32 | a | 46.17 | 59.90 | 67.92 | 69.13 | 67.32 | 59.77 | 48.58 | f | 41.52 | b | 33.12 | f | 50.64 | b | ||||||
| 1923 | 27.63 | 24.59 | ----- | z | 50.65 | g | 59.63 | 71.08 | 73.08 | 69.73 | 68.20 | 54.66 | 45.80 | 43.10 | b | 53.75 | b | |||||||||
| 1924 | 33.06 | d | 27.55 | 39.38 | a | 48.27 | 57.86 | b | 66.98 | 73.95 | 73.16 | 66.91 | a | 53.34 | c | 44.96 | d | 32.19 | b | 51.47 | ||||||
| 1925 | 31.04 | c | 39.93 | 41.66 | 49.10 | 55.92 | 68.58 | 69.60 | 68.65 | 63.35 | 49.06 | 42.87 | 35.42 | 51.26 | ||||||||||||
| 1926 | 31.95 | 27.16 | 33.68 | 43.95 | 54.85 | a | 61.78 | 69.08 | 72.50 | 62.73 | 54.38 | a | 46.41 | b | 29.93 | b | 49.03 | |||||||||
| 1927 | 30.05 | b | 34.23 | b | 39.58 | 45.93 | b | 54.81 | b | 62.98 | 69.89 | 66.94 | 64.47 | 58.61 | 49.44 | c | 35.05 | 51.00 | ||||||||
| 1928 | 31.72 | b | 29.02 | 35.03 | 43.03 | 52.97 | 61.33 | 69.58 | a | 70.23 | c | 59.44 | d | 51.87 | a | 42.59 | b | 36.46 | e | 48.61 | ||||||
| 1929 | 28.42 | 29.83 | b | 38.60 | 44.52 | 55.90 | 64.93 | 67.92 | 65.60 | 60.62 | b | 49.26 | 42.27 | 31.90 | e | 48.31 | ||||||||||
| 1930 | 32.72 | d | 32.09 | 36.29 | 43.95 | 61.61 | 72.85 | 75.03 | 71.95 | ----- | z | 55.18 | 47.11 | b | 35.98 | e | 51.34 | a | ||||||||
| 1931 | 29.43 | b | 30.83 | b | 37.29 | 46.73 | 57.29 | 63.83 | 70.89 | 71.98 | a | 67.18 | 58.18 | 49.57 | b | 35.85 | 51.59 | |||||||||
| 1932 | 39.22 | b | 31.48 | 35.10 | 46.35 | 56.98 | 63.92 | 69.98 | 70.06 | 61.50 | 53.69 | 41.52 | 37.27 | 50.59 | ||||||||||||
| 1933 | 39.58 | 34.38 | b | 37.34 | 47.17 | 58.13 | 66.66 | b | 70.21 | 71.47 | 64.83 | 53.95 | 39.72 | a | 31.12 | b | 51.21 | |||||||||
| 1934 | 31.97 | 20.61 | 36.76 | 48.12 | 60.56 | 68.82 | 75.42 | 70.26 | 68.78 | 52.97 | 48.61 | b | 34.40 | 51.44 | ||||||||||||
| 1935 | 25.93 | c | 28.23 | 40.68 | ----- | z | 57.13 | 66.12 | 75.44 | 73.55 | 65.13 | 55.21 | 48.75 | 30.07 | b | 51.48 | a | |||||||||
| 1936 | 27.78 | b | 23.96 | d | 43.03 | ----- | z | 62.39 | v | 66.19 | a | 70.10 | 71.39 | 64.16 | b | 55.97 | 41.48 | 35.31 | b | 49.94 | b | |||||
| 1937 | 37.60 | b | 33.73 | 34.29 | 43.98 | 59.60 | 66.50 | 73.16 | 74.40 | 64.33 | 54.21 | 45.08 | 32.61 | 51.63 | ||||||||||||
| 1938 | 29.16 | 31.86 | 38.90 | 47.20 | 53.85 | 62.70 | 68.85 | 73.00 | 65.70 | 57.92 | 43.45 | s | 35.71 | 51.35 | a | |||||||||||
| 1939 | 30.61 | 34.75 | 35.66 | 44.95 | 55.76 | 63.73 | 70.18 | 74.55 | a | 63.93 | a | 55.65 | 41.95 | 34.81 | 50.54 | |||||||||||
| 1940 | 22.89 | 30.00 | 32.23 | 41.58 | 56.63 | 65.00 | 71.87 | 68.56 | 64.48 | 51.45 | 44.12 | 36.38 | b | 48.77 | ||||||||||||
| 1941 | 27.19 | 29.96 | 34.02 | 50.37 | 60.21 | 68.03 | 72.63 | 72.23 | 67.30 | 57.32 | 48.85 | 36.73 | 52.07 | |||||||||||||
| 1942 | 29.21 | 28.05 | 40.18 | 48.07 | 59.58 | 66.35 | 71.24 | 70.44 | 65.12 | 56.56 | 45.80 | 29.52 | 50.84 | |||||||||||||
| 1943 | 28.29 | b | 31.36 | 37.87 | 43.30 | 57.52 | 70.35 | 72.98 | 71.13 | 64.23 | 56.29 | 45.45 | a | 30.82 | 50.80 | |||||||||||
| 1944 | 32.84 | 32.67 | 36.74 | 45.88 | 61.02 | 66.92 | 74.55 | 73.87 | 67.12 | 55.32 | 45.78 | 32.58 | 52.11 | |||||||||||||
| 1945 | 24.56 | 30.86 | 43.74 | 50.98 | 53.15 | 63.67 | 69.77 | 67.77 | 65.18 | 51.90 | 44.50 | 29.19 | 49.61 | |||||||||||||
| 1946 | 30.68 | 29.59 | 44.87 | 45.07 | 55.94 | 65.13 | 70.31 | 68.53 | 66.87 | 60.03 | 50.37 | 38.98 | 52.20 | |||||||||||||
| 1947 | 36.93 | a | 30.22 | a | 38.42 | 46.32 | 55.68 | 62.93 | 72.77 | 71.58 | 65.60 | 61.34 | 43.33 | 32.89 | 51.50 | |||||||||||
| 1948 | 26.71 | 29.17 | 37.90 | 46.20 | 53.66 | 61.22 | 71.10 | 71.19 | 63.82 | 53.35 | 48.88 | 36.34 | 49.96 | |||||||||||||
| 1949 | 36.45 | 35.73 | 38.55 | 49.77 | 57.58 | 68.98 | 73.97 | 72.56 | 63.07 | 58.52 | 44.72 | 38.84 | 53.23 | |||||||||||||
| 1950 | 39.06 | 31.38 | 35.52 | 45.80 | 54.48 | a | 65.77 | b | 71.62 | a | 69.06 | 61.07 | b | 56.34 | 48.05 | 36.50 | 51.22 | |||||||||
| 1951 | 36.16 | 36.07 | e | 39.26 | 49.43 | 57.58 | 65.30 | 72.50 | 70.06 | 66.15 | 56.85 | 44.50 | 38.11 | 52.67 | ||||||||||||
| 1952 | 36.18 | 35.60 | 39.50 | 51.03 | 57.87 | 68.78 | 76.21 | 70.77 | 64.70 | 52.37 | 45.57 | 36.79 | 52.95 | |||||||||||||
| 1953 | 36.23 | 36.41 | 39.30 | a | 48.15 | 56.48 | 66.42 | 69.97 | a | 69.08 | 64.87 | 55.40 | 48.35 | 40.81 | 52.62 | |||||||||||
| 1954 | 30.27 | 37.83 | b | 39.19 | 48.05 | a | 55.42 | 62.62 | a | 67.79 | 66.10 | a | 61.33 | 57.68 | 44.30 | 36.55 | 50.59 | |||||||||
| 1955 | 30.95 | 34.04 | a | 40.03 | 49.12 | 60.08 | 65.02 | g | 76.02 | a | 74.00 | b | 64.88 | 57.76 | 42.71 | b | 28.02 | a | 50.69 | a | ||||||
| 1956 | 31.82 | 34.22 | 34.36 | m | 45.42 | e | 53.00 | g | 68.02 | e | 70.66 | i | 71.66 | 61.02 | e | 55.93 | b | 46.78 | a | 39.47 | 50.48 | c | ||||
| 1957 | 26.59 | b | 36.20 | 40.61 | 50.13 | 59.68 | 70.59 | a | 73.55 | b | 69.34 | c | 66.12 | a | 55.68 | f | 48.44 | c | 40.91 | b | 52.92 | a | ||||
| 1958 | 33.32 | a | 27.39 | 40.32 | a | 49.40 | 55.52 | a | 63.75 | 72.18 | 71.34 | 64.57 | 54.39 | 47.72 | 28.71 | 50.72 | ||||||||||
| 1959 | 30.34 | 29.39 | 38.20 | a | 49.12 | 60.77 | 65.30 | 72.55 | 73.81 | 69.05 | 56.64 | c | 46.15 | d | 37.88 | a | 52.43 | |||||||||
| 1960 | 32.73 | 37.36 | 33.81 | 49.03 | 60.02 | 68.37 | 72.31 | 72.34 | 64.61 | g | 56.13 | 49.18 | 31.19 | 51.13 | a | |||||||||||
| 1961 | 27.47 | 33.10 | b | 39.29 | 47.15 | 56.26 | 67.67 | 72.90 | 72.63 | 70.45 | 58.95 | 46.33 | 35.31 | 52.29 | ||||||||||||
| 1962 | 31.74 | 30.09 | 39.85 | 49.45 | 58.39 | 67.88 | 70.98 | c | 71.09 | b | 63.88 | 55.68 | 43.92 | 32.06 | 51.25 | |||||||||||
| 1963 | 31.03 | b | 29.48 | 41.31 | 50.87 | 58.53 | 69.57 | 75.31 | 72.71 | 61.93 | 59.64 | b | 48.95 | b | 28.61 | 52.33 | ||||||||||
| 1964 | 34.02 | 31.60 | 40.31 | 47.32 | 61.76 | 68.21 | a | 71.90 | 69.05 | 64.60 | 55.08 | 47.48 | 36.13 | 52.29 | ||||||||||||
| 1965 | 28.79 | 31.09 | 38.31 | 46.60 | 60.56 | 67.78 | 73.67 | a | 73.08 | 65.32 | 55.03 | 43.60 | 37.39 | 51.77 | ||||||||||||
| 1966 | 30.71 | 33.64 | 41.16 | 46.43 | 56.40 | 67.75 | 74.82 | 73.55 | 64.63 | 55.19 | 48.35 | 35.97 | 52.38 | |||||||||||||
| 1967 | 37.42 | 29.18 | 35.73 | 46.03 | 52.90 | 66.88 | 73.31 | 72.30 | d | 65.13 | 56.59 | c | 43.27 | b | 36.93 | b | 51.31 | |||||||||
| 1968 | 27.65 | a | 28.83 | 40.86 | b | 51.03 | 57.77 | 65.93 | 75.40 | 73.08 | 68.02 | 59.63 | 45.84 | a | 33.03 | 52.26 | ||||||||||
| 1969 | 31.92 | 32.64 | 37.98 | 50.92 | 59.34 | 68.77 | 72.32 | 75.39 | 66.87 | 57.16 | 46.37 | 34.10 | 52.81 | |||||||||||||
| 1970 | 24.71 | 34.18 | 37.97 | 50.05 | 59.58 | 66.85 | 75.48 | 74.87 | 66.78 | 58.10 | 47.90 | 32.42 | 52.41 | |||||||||||||
| 1971 | 26.68 | 34.09 | 39.47 | 46.72 | 57.63 | 69.25 | 75.32 | 74.94 | 70.60 | 61.74 | 43.95 | 38.77 | 53.26 | |||||||||||||
| 1972 | 34.45 | 31.48 | 38.15 | 45.88 | 58.66 | 65.35 | 74.10 | 73.06 | 67.17 | 52.14 | c | 43.58 | 38.58 | 51.88 | ||||||||||||
| 1973 | 34.63 | 33.32 | 46.13 | 51.82 | 59.23 | 71.85 | 75.74 | 77.45 | 68.20 | 59.45 | 47.35 | 41.81 | 55.58 | |||||||||||||
| 1974 | 35.89 | 33.62 | ----- | z | 53.47 | l | 59.10 | 68.73 | 76.19 | 76.81 | 68.90 | 55.24 | 49.33 | 40.81 | b | 56.46 | b | |||||||||
| 1975 | 39.79 | 36.38 | 41.15 | 48.37 | 63.63 | 70.22 | 77.20 | d | 76.95 | 67.15 | 61.52 | 54.97 | 39.21 | 56.38 | ||||||||||||
| 1976 | 30.68 | 42.36 | v | 39.65 | 51.87 | 56.93 | a | 67.25 | 71.24 | 70.39 | 64.32 | 51.66 | 40.50 | 29.00 | 52.13 | a | ||||||||||
| 1977 | 23.84 | 30.00 | 42.44 | 48.43 | 59.39 | 65.38 | 73.35 | 72.81 | 64.83 | 54.47 | 47.83 | 33.52 | 51.36 | |||||||||||||
| 1978 | 28.27 | 26.34 | 35.84 | 46.52 | 57.47 | 67.50 | 71.10 | b | 72.76 | 61.58 | 53.98 | 44.63 | 36.97 | 50.25 | ||||||||||||
| 1979 | 32.24 | 22.64 | 41.08 | 47.22 | 60.90 | 65.57 | 73.34 | 70.76 | 64.38 | 53.60 | 49.27 | 37.44 | 51.54 | |||||||||||||
| 1980 | 30.19 | 27.88 | 37.02 | 49.10 | 59.05 | 64.28 | 74.02 | 73.68 | 66.63 | 52.45 | 42.10 | 30.06 | 50.54 | |||||||||||||
| 1981 | 21.58 | 35.71 | 37.68 | 48.93 | 58.11 | 68.25 | 74.06 | 70.34 | 63.02 | 50.98 | 43.80 | 33.34 | 50.48 | |||||||||||||
| 1982 | 20.67 | m | 30.00 | l | 37.29 | 45.14 | i | 56.83 | d | 61.67 | a | 72.29 | 67.73 | i | 62.59 | g | 53.44 | o | 46.60 | a | 41.28 | m | 54.94 | g | ||
| 1983 | 32.03 | 33.12 | 39.60 | 46.39 | c | 53.78 | a | 67.70 | 73.31 | 71.18 | 67.98 | 55.19 | j | 46.88 | a | 33.22 | a | 51.38 | a | |||||||
| 1984 | 28.11 | 35.00 | l | 32.85 | a | 45.47 | 55.65 | 67.00 | 71.19 | 72.74 | 62.00 | 55.69 | 45.00 | 40.35 | 52.37 | a | ||||||||||
| 1985 | 25.81 | b | ----- | z | 41.72 | d | 50.53 | 56.15 | 61.52 | 71.34 | 70.48 | d | 65.27 | 56.58 | 49.67 | 33.44 | d | 52.96 | a | |||||||
| 1986 | 33.76 | 31.59 | 41.21 | 49.62 | a | 58.68 | 65.32 | 70.61 | 70.00 | 62.65 | f | 54.89 | 43.52 | b | 38.06 | 50.66 | a | |||||||||
| 1987 | 31.83 | p | 31.07 | 41.68 | i | 48.45 | b | 58.37 | 69.62 | e | 73.39 | 71.21 | 65.80 | 53.13 | a | 43.53 | 34.87 | 54.94 | b | |||||||
| 1988 | 26.85 | 30.81 | 37.66 | 45.80 | b | 57.21 | 67.08 | 74.31 | 75.44 | 64.70 | 50.35 | 46.17 | 32.21 | 50.72 | ||||||||||||
| 1989 | 33.34 | 28.60 | b | 36.61 | 45.54 | d | 58.90 | a | 69.02 | 73.00 | 73.21 | 67.02 | 56.35 | 43.95 | 20.35 | 50.49 | ||||||||||
| 1990 | 34.81 | m | 35.05 | r | 37.81 | b | 46.05 | b | 55.16 | 67.30 | 73.44 | d | 75.47 | 65.45 | 58.80 | i | 44.17 | l | 39.04 | q | 60.10 | e | ||||
| 1991 | 29.77 | t | 37.13 | m | 40.30 | i | 50.28 | e | 61.90 | e | 70.60 | j | 75.22 | b | 75.27 | 64.23 | 57.10 | 45.15 | 35.67 | a | 58.10 | d | ||||
| 1992 | 29.85 | 31.02 | 33.71 | 44.07 | 55.32 | a | 66.77 | 71.42 | 70.98 | a | 64.72 | 52.24 | 42.38 | 34.66 | 49.76 | |||||||||||
| 1993 | 30.56 | 24.84 | 34.19 | b | 46.18 | 60.26 | 68.22 | 75.45 | 74.27 | 65.14 | a | 53.07 | a | 45.48 | a | 33.37 | 50.92 | |||||||||
| 1994 | 22.19 | 25.84 | 37.63 | 50.40 | 55.57 | a | 69.82 | 77.84 | 71.48 | 64.50 | 54.66 | 49.30 | b | 38.16 | 51.45 | |||||||||||
| 1995 | 34.81 | 28.63 | a | ----- | z | ----- | z | 55.87 | a | 68.10 | 76.18 | 73.69 | 64.12 | 58.97 | a | 42.21 | a | 28.77 | 53.13 | b | ||||||
| 1996 | 28.59 | d | 28.71 | 34.71 | b | 47.21 | a | 57.33 | b | 68.38 | a | 72.03 | 71.79 | c | 65.50 | a | 53.53 | b | 38.61 | c | 39.24 | b | 50.47 | |||
| 1997 | 28.40 | a | 34.98 | c | 36.60 | b | 46.40 | a | 54.58 | 67.95 | 74.89 | 72.82 | a | 65.31 | a | 54.13 | 42.28 | 35.56 | g | 52.58 | a | |||||
| 1998 | 35.52 | a | 36.73 | 39.13 | a | 49.21 | d | 60.37 | a | 66.45 | 74.83 | a | 74.35 | 67.91 | b | 55.02 | b | 44.64 | a | 39.34 | 53.63 | |||||
| 1999 | 31.06 | 32.83 | b | 38.43 | a | 49.05 | a | 60.25 | a | 71.37 | 78.03 | a | 73.77 | a | 69.32 | 54.64 | b | 48.05 | b | 37.43 | b | 53.69 | ||||
| 2000 | 30.14 | i | 33.93 | b | 42.48 | 45.98 | b | 58.40 | 68.19 | a | 71.76 | b | 72.39 | 65.20 | b | 55.28 | a | 43.06 | f | 28.85 | e | 54.25 | b | |||
| 2001 | 29.16 | b | 32.48 | f | 36.27 | 47.71 | b | 60.52 | c | 72.90 | 72.18 | a | 77.37 | a | 68.22 | 58.07 | c | 50.28 | a | 41.94 | e | 55.87 | a | |||
| 2002 | 37.46 | d | 35.88 | b | 41.50 | a | 51.64 | b | 58.00 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.90 | g |
| 2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z |
| 2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2016 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2019 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 30.57 | 30.65 | 38.04 | 47.09 | 57.36 | 66.33 | 72.34 | 71.23 | 64.63 | 54.91 | 44.92 | 34.33 | 51.01 | |||||||||||||
| S.D. | 4.39 | 3.79 | 3.05 | 2.43 | 2.44 | 2.71 | 2.37 | 2.76 | 2.49 | 2.84 | 3.28 | 4.12 | 1.80 | |||||||||||||
| SKEW | 0.01 | -0.23 | 0.03 | -0.01 | -0.19 | -0.06 | 0.05 | -0.08 | -0.07 | 0.02 | -0.10 | -0.40 | -0.06 | |||||||||||||
| MAX | 39.79 | 39.93 | 46.13 | 51.87 | 63.63 | 72.90 | 78.03 | 77.45 | 70.60 | 61.74 | 54.97 | 43.10 | 56.38 | |||||||||||||
| MIN | 21.18 | 20.61 | 31.16 | 41.58 | 49.67 | 59.65 | 66.95 | 64.03 | 58.28 | 48.29 | 35.48 | 20.35 | 45.44 | |||||||||||||
| YRS | 97 | 97 | 100 | 100 | 105 | 104 | 105 | 103 | 100 | 98 | 100 | 98 | 69 | |||||||||||||