Every January in Dayton, OH from 1894 to 2026, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.
| Year | Mean, °F | Rank | High, °F | Rank | Low, °F | Rank | Precipitation, in | Rank | Days missing |
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| 2026 | 22.9 | 112 | 31.3 | 104 | 14.5 | 113 | 2.01 | 82 | 0 |
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| 2025 | 23.8 | 106 | 31.2 | 105 | 16.3 | 100 | 1.21 | 117 | 0 |
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| 2024 | 31 | 49 | 36.7 | 60 | 25.3 | 35 | 5.43 | 13 | 0 |
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| 2023 | 37.5 | 5 | 44.1 | 12 | 30.8 | 4 | 3.63 | 35 | 0 |
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| 2022 | 25.4 | 93 | 34.2 | 91 | 16.6 | 98 | 2.03 | 80 | 0 |
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| 2021 | 32.1 | 38 | 37.4 | 55 | 26.7 | 25 | 2.82 | 57 | 0 |
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| 2020 | 36.1 | 12 | 42.4 | 21 | 29.7 | 6 | 3.83 | 30 | 0 |
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| 2019 | 28.5 | 70 | 35.5 | 77 | 21.5 | 64 | 3.25 | 44 | 0 |
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| 2018 | 25.7 | 91 | 33.7 | 93 | 17.7 | 92 | 2.69 | 59 | 0 |
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| 2017 | 34.4 | 23 | 41 | 29 | 27.7 | 19 | 3.42 | 41 | 0 |
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| 2016 | 27.9 | 80 | 36.5 | 64 | 19.4 | 83 | 1.50 | 104 | 0 |
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| 2015 | 26.3 | 88 | 34.8 | 85 | 17.8 | 91 | 2.97 | 51 | 0 |
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| 2014 | 21.3 | 115 | 31.1 | 107 | 11.4 | 123 | 2.84 | 56 | 0 |
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| 2013 | 30.6 | 52 | 38.5 | 49 | 22.8 | 50 | 3.10 | 48 | 0 |
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| 2012 | 30.7 | 51 | 39.1 | 43 | 22.3 | 58 | 4.73 | 16 | 0 |
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| 2011 | 22.9 | 112 | 29.8 | 116 | 16.1 | 103 | 1.43 | 110 | 0 |
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| 2010 | 24.3 | 102 | 30.3 | 115 | 18.3 | 89 | 1.47 | 106 | 0 |
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| 2009 | 21 | 118 | 28.9 | 119 | 13.2 | 117 | 2.03 | 80 | 0 |
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| 2008 | 28.5 | 70 | 36.7 | 60 | 20.4 | 76 | 2.04 | 79 | 0 |
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| 2007 | 32.3 | 37 | 38.7 | 46 | 25.8 | 33 | 4.08 | 23 | 0 |
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| 2006 | 39 | 2 | 46.3 | 3 | 31.8 | 2 | 2.97 | 51 | 0 |
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| 2005 | 28.5 | 70 | 35.4 | 79 | 21.6 | 62 | 9.22 | 3 | 0 |
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| 2004 | 23.5 | 107 | 30.9 | 110 | 16.2 | 102 | 4.62 | 18 | 0 |
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| 2003 | 20.7 | 120 | 27.6 | 124 | 13.8 | 116 | 1.07 | 122 | 0 |
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| 2002 | 34.7 | 19 | 42.6 | 17 | 26.7 | 25 | 1.52 | 103 | 0 |
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| 2001 | 28.1 | 76 | 34.9 | 83 | 21.3 | 67 | 0.84 | 129 | 0 |
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| 2000 | 24.9 | 98 | 34.3 | 90 | 15.5 | 111 | 3.20 | 45 | 0 |
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| 1999 | 28.8 | 68 | 37.4 | 55 | 20.2 | 77 | 3.93 | 25 | 0 |
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| 1998 | 35.9 | 14 | 42.4 | 21 | 29.5 | 7 | 3.30 | 42 | 0 |
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| 1997 | 25.7 | 91 | 33.8 | 92 | 17.6 | 93 | 2.40 | 65 | 0 |
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| 1996 | 25.1 | 96 | 32.7 | 101 | 17.4 | 95 | 4.11 | 22 | 0 |
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| 1995 | 28.9 | 65 | 36.1 | 72 | 21.7 | 61 | 2.39 | 66 | 0 |
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| 1994 | 20 | 125 | 27.5 | 125 | 12.5 | 121 | 3.76 | 32 | 0 |
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| 1993 | 32.1 | 38 | 39.1 | 43 | 25 | 38 | 3.88 | 27 | 0 |
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| 1992 | 30 | 54 | 37.2 | 58 | 22.8 | 50 | 3.06 | 49 | 0 |
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| 1991 | 28 | 77 | 34.8 | 85 | 21.3 | 67 | 2.53 | 63 | 0 |
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| 1990 | 37 | 7 | 44.7 | 8 | 29.4 | 9 | 2.28 | 71 | 0 |
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| 1989 | 36.3 | 10 | 44.6 | 10 | 28 | 15 | 2.72 | 58 | 0 |
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| 1988 | 26 | 90 | 35 | 81 | 17.1 | 96 | 1.46 | 109 | 0 |
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| 1987 | 28.2 | 74 | 34.5 | 88 | 21.8 | 60 | 1.06 | 123 | 0 |
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| 1986 | 29.1 | 62 | 37 | 59 | 21.2 | 69 | 1.68 | 91 | 0 |
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| 1985 | 19.4 | 126 | 25.8 | 128 | 13 | 119 | 1.56 | 100 | 0 |
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| 1984 | 21.2 | 117 | 27.9 | 122 | 14.5 | 113 | 1.15 | 118 | 0 |
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| 1983 | 29.1 | 62 | 35.5 | 77 | 22.7 | 53 | 1.39 | 112 | 0 |
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| 1982 | 20.9 | 119 | 30.8 | 112 | 11 | 126 | 6.03 | 10 | 0 |
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| 1981 | 23.2 | 111 | 30.8 | 112 | 15.7 | 109 | 0.30 | 132 | 0 |
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| 1980 | 27.9 | 80 | 35 | 81 | 20.9 | 73 | 2.16 | 76 | 0 |
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| 1979 | 20.6 | 121 | 27.9 | 122 | 13.2 | 117 | 3.29 | 43 | 0 |
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| 1978 | 18.7 | 127 | 26 | 126 | 11.3 | 124 | 4.72 | 17 | 0 |
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| 1977 | 11.6 | 131 | 20.3 | 131 | 2.9 | 131 | 1.64 | 93 | 0 |
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| 1976 | 24.1 | 103 | 32.4 | 102 | 15.8 | 108 | 3.01 | 50 | 0 |
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| 1975 | 33.3 | 33 | 40.4 | 36 | 26.2 | 31 | 3.59 | 37 | 0 |
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| 1974 | 32.4 | 36 | 40.6 | 33 | 24.2 | 43 | 2.67 | 60 | 0 |
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| 1973 | 31.2 | 47 | 39.7 | 41 | 22.8 | 50 | 1.63 | 96 | 0 |
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| 1972 | 27.5 | 84 | 36.5 | 64 | 18.5 | 86 | 1.47 | 106 | 0 |
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| 1971 | 23.9 | 104 | 32.9 | 99 | 14.8 | 112 | 1.64 | 93 | 0 |
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| 1970 | 20.6 | 121 | 28.5 | 121 | 12.8 | 120 | 1.23 | 116 | 0 |
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| 1969 | 26.6 | 87 | 34.8 | 85 | 18.5 | 86 | 3.75 | 33 | 0 |
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| 1968 | 24.7 | 99 | 33.1 | 97 | 16.3 | 100 | 1.67 | 92 | 0 |
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| 1967 | 33.9 | 28 | 41.8 | 24 | 26 | 32 | 0.69 | 131 | 0 |
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| 1966 | 21.8 | 114 | 29.5 | 117 | 14.1 | 115 | 2.33 | 68 | 0 |
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| 1965 | 29.1 | 62 | 38.4 | 51 | 19.9 | 81 | 2.32 | 69 | 0 |
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| 1964 | 31.4 | 44 | 40.4 | 36 | 22.5 | 56 | 1.60 | 98 | 0 |
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| 1963 | 20.3 | 123 | 29.3 | 118 | 11.3 | 124 | 0.96 | 126 | 0 |
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| 1962 | 25.2 | 95 | 33.3 | 96 | 17 | 97 | 2.90 | 55 | 0 |
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| 1961 | 23.5 | 107 | 31.2 | 105 | 15.7 | 109 | 1.13 | 119 | 0 |
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| 1960 | 31.8 | 41 | 38.5 | 49 | 25.1 | 37 | 1.97 | 84 | 0 |
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| 1959 | 25.1 | 96 | 34.4 | 89 | 15.9 | 107 | 6.85 | 7 | 0 |
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| 1958 | 27 | 86 | 33.5 | 95 | 20.5 | 75 | 1.81 | 86 | 0 |
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| 1957 | 23.9 | 104 | 31.1 | 107 | 16.6 | 98 | 1.80 | 87 | 0 |
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| 1956 | 26.2 | 89 | 33.6 | 94 | 18.9 | 85 | 1.56 | 100 | 0 |
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| 1955 | 28 | 77 | 34.9 | 83 | 21.2 | 69 | 1.59 | 99 | 0 |
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| 1954 | 31.4 | 44 | 38.6 | 48 | 24.2 | 43 | 2.53 | 63 | 0 |
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| 1953 | 33.8 | 30 | 40.5 | 34 | 27.1 | 24 | 3.63 | 35 | 0 |
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| 1952 | 33.9 | 28 | 41.2 | 25 | 26.4 | 30 | 7.07 | 6 | 2 |
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| 1951 | 29.5 | 61 | 36.3 | 70 | 22.6 | 55 | 3.88 | 27 | 0 |
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| 1950 | 38.4 | 4 | 46.8 | 2 | 29.9 | 5 | 9.86 | 2 | 0 |
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| 1949 | 35.4 | 17 | 42.8 | 15 | 27.9 | 17 | 7.23 | 5 | 0 |
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| 1948 | 20.1 | 124 | 28.6 | 120 | 11.7 | 122 | 2.32 | 69 | 0 |
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| 1947 | 36.3 | 10 | 43.1 | 13 | 29.5 | 7 | 4.92 | 15 | 0 |
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| 1946 | 32.5 | 35 | 40.5 | 34 | 24.4 | 42 | 1.12 | 121 | 0 |
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| 1945 | 24.5 | 100 | 31 | 109 | 17.9 | 90 | 0.93 | 128 | 0 |
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| 1944 | 34 | 26 | 41.2 | 25 | 26.7 | 25 | 0.73 | 130 | 0 |
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| 1943 | 31.8 | 41 | 39.7 | 41 | 23.9 | 46 | 1.37 | 114 | 0 |
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| 1942 | 29.7 | 59 | 36.7 | 60 | 22.7 | 53 | 1.55 | 102 | 0 |
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| 1941 | 30.5 | 53 | 36.4 | 68 | 24.6 | 41 | 1.72 | 89 | 0 |
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| 1940 | 17.4 | 129 | 24.5 | 129 | 10.2 | 129 | 1.71 | 90 | 0 |
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| 1939 | 35.9 | 14 | 42.9 | 14 | 28.9 | 11 | 3.49 | 39 | 0 |
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| 1938 | 31.2 | 47 | 38.2 | 54 | 24.2 | 43 | 1.48 | 105 | 0 |
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| 1937 | 37.2 | 6 | 45.1 | 7 | 29.4 | 9 | 12.41 | 1 | 0 |
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| 1936 | 23.4 | 110 | 30.7 | 114 | 16.1 | 103 | 1.47 | 106 | 0 |
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| 1935 | 31.6 | 43 | 39.9 | 38 | 23.3 | 47 | 2.62 | 61 | 0 |
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| 1934 | | | | | | | 1.39 | 112 | 10 |
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| 1933 | 39 | 2 | 46.3 | 3 | 31.8 | 2 | 2.16 | 76 | 0 |
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| 1932 | 40.3 | 1 | 47.2 | 1 | 33.4 | 1 | 6.14 | 9 | 0 |
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| 1931 | 33.8 | 30 | 39.9 | 38 | 27.8 | 18 | 0.97 | 124 | 0 |
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| 1930 | 28.4 | 73 | 36.1 | 72 | 20.7 | 74 | 5.27 | 14 | 0 |
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| 1929 | 27.4 | 85 | 36.3 | 70 | 18.5 | 86 | 4.34 | 20 | 0 |
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| 1928 | 29.9 | 55 | 37.4 | 55 | 22.4 | 57 | 1.37 | 114 | 0 |
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| 1927 | 29.9 | 55 | 36.5 | 64 | 23.3 | 47 | 4.14 | 21 | 0 |
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| 1926 | 28.7 | 69 | 36 | 74 | 21.5 | 64 | 2.25 | 73 | 0 |
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| 1925 | 28.9 | 65 | 36.7 | 60 | 21.1 | 71 | 0.95 | 127 | 0 |
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| 1924 | 25.3 | 94 | 33 | 98 | 17.6 | 93 | 3.71 | 34 | 0 |
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| 1923 | 34.5 | 22 | 40.9 | 30 | 28.1 | 13 | 3.83 | 30 | 0 |
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| 1922 | 27.8 | 82 | 35.9 | 75 | 19.8 | 82 | 1.43 | 110 | 0 |
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| 1921 | 34.7 | 19 | 41.2 | 25 | 28.2 | 12 | 2.59 | 62 | 0 |
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| 1920 | 23.5 | 107 | 30.9 | 110 | 16 | 105 | 1.80 | 87 | 0 |
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| 1919 | 34.4 | 23 | 42.3 | 23 | 26.5 | 29 | 0.97 | 124 | 0 |
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| 1918 | 14.9 | 130 | 22.8 | 130 | 7.1 | 130 | 3.46 | 40 | 0 |
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| 1917 | 29.9 | 55 | 38.3 | 53 | 21.5 | 64 | 4.04 | 24 | 0 |
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| 1916 | 36.4 | 9 | 45.6 | 6 | 27.3 | 21 | 5.67 | 12 | 0 |
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| 1915 | 27.6 | 83 | 35.2 | 80 | 20 | 79 | 3.88 | 27 | 0 |
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| 1914 | 34.4 | 23 | 40.8 | 31 | 28 | 15 | 2.19 | 75 | 0 |
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| 1913 | 36.9 | 8 | 45.7 | 5 | 28.1 | 13 | 6.66 | 8 | 0 |
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| 1912 | 18.4 | 128 | 26 | 126 | 10.8 | 127 | 2.25 | 73 | 0 |
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| 1911 | 35.1 | 18 | 42.6 | 17 | 27.6 | 20 | 3.91 | 26 | 0 |
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| 1910 | 29.7 | 59 | 36.5 | 64 | 22.9 | 49 | 3.15 | 47 | 0 |
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| 1909 | 33.1 | 34 | 41.2 | 25 | 24.9 | 39 | 2.95 | 54 | 0 |
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| 1908 | 30.9 | 50 | 39.9 | 38 | 22 | 59 | 1.64 | 93 | 0 |
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| 1907 | 34.7 | 19 | 42.8 | 15 | 26.6 | 28 | 8.16 | 4 | 0 |
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| 1906 | 36 | 13 | 44.7 | 8 | 27.3 | 21 | 2.96 | 53 | 0 |
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| 1905 | 24.4 | 101 | 32.8 | 100 | 16 | 105 | 1.63 | 96 | 0 |
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| 1904 | 21.3 | 115 | 31.9 | 103 | 10.7 | 128 | 4.61 | 19 | 0 |
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| 1903 | 28.2 | 74 | 36.4 | 68 | 20 | 79 | 2.39 | 66 | 0 |
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| 1902 | 28.9 | 65 | 38.4 | 51 | 19.4 | 83 | 1.13 | 119 | 0 |
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| 1901 | 29.9 | 55 | 39 | 45 | 21.1 | 71 | 2.00 | 83 | 1 |
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| 1900 | 33.7 | 32 | 42.5 | 20 | 24.8 | 40 | 3.16 | 46 | 0 |
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| 1899 | 31.4 | 44 | 40.8 | 31 | 21.6 | 62 | 3.51 | 38 | 1 |
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| 1898 | 34 | 26 | 42.6 | 17 | 25.5 | 34 | 5.95 | 11 | 0 |
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| 1897 | 28 | 77 | 35.9 | 75 | 20.1 | 78 | 2.07 | 78 | 1 |
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| 1896 | 32 | 40 | 38.7 | 46 | 25.2 | 36 | 1.82 | 85 | 0 |
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| 1894 | 35.8 | 16 | 44.4 | 11 | 27.2 | 23 | 2.27 | 72 | 0 |
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