Every winter in Rockford, IL from 1893 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 | 24.1 | 56 | 33.4 | 40 | 14.8 | 77 | 2.72 | 107 | 0 |
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| 2025 | 24.6 | 48 | 33.3 | 43 | 15.9 | 58 | 2.38 | 113 | 0 |
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| 2024 | 32.3 | 1 | 39.9 | 1 | 24.6 | 1 | 5.70 | 34 | 0 |
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| 2023 | 28.3 | 14 | 36 | 17 | 20.7 | 15 | 8.42 | 7 | 0 |
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| 2022 | 25.6 | 36 | 34.9 | 26 | 16.3 | 52 | 4.05 | 86 | 0 |
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| 2021 | 24.8 | 43 | 32.3 | 58 | 17.3 | 41 | 4.61 | 71 | 0 |
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| 2020 | 29.2 | 9 | 36.9 | 10 | 21.5 | 13 | 4.82 | 61 | 0 |
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| 2019 | 23.7 | 67 | 31.2 | 78 | 16.2 | 54 | 8.96 | 3 | 0 |
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| 2018 | 23.3 | 73 | 32 | 62 | 14.6 | 81 | 5.44 | 47 | 0 |
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| 2017 | 29.1 | 12 | 36.7 | 11 | 21.6 | 10 | 5.91 | 29 | 0 |
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| 2016 | 30.1 | 4 | 36.5 | 13 | 23.7 | 4 | 6.18 | 21 | 0 |
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| 2015 | 21.4 | 94 | 29.1 | 98 | 13.8 | 91 | 2.85 | 105 | 0 |
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| 2014 | 14.7 | 114 | 24.1 | 117 | 5.2 | 119 | 5.43 | 48 | 0 |
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| 2013 | 27.2 | 22 | 35.2 | 24 | 19.2 | 25 | 8.56 | 5 | 0 |
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| 2012 | 30.1 | 4 | 38.4 | 4 | 21.9 | 8 | 4.60 | 72 | 0 |
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| 2011 | 21.5 | 93 | 28.7 | 99 | 14.4 | 84 | 4.51 | 73 | 0 |
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| 2010 | 22 | 87 | 28.5 | 100 | 15.4 | 69 | 5.06 | 57 | 0 |
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| 2009 | 19.6 | 100 | 28.4 | 101 | 10.8 | 106 | 7.04 | 13 | 0 |
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| 2008 | 22.1 | 85 | 29.9 | 89 | 14.3 | 86 | 7.56 | 8 | 0 |
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| 2007 | 24.6 | 48 | 32.2 | 60 | 17 | 44 | 4.76 | 63 | 0 |
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| 2006 | 26.6 | 27 | 33.7 | 38 | 19.5 | 21 | 4.63 | 69 | 0 |
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| 2005 | 25.9 | 34 | 33 | 48 | 18.8 | 29 | 5.45 | 46 | 0 |
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| 2004 | 24.7 | 46 | 32.5 | 57 | 16.9 | 47 | 4.45 | 76 | 0 |
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| 2003 | 23.3 | 73 | 31.9 | 67 | 14.6 | 81 | 1.28 | 123 | 0 |
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| 2002 | 30.9 | 3 | 39 | 3 | 22.8 | 5 | 3.64 | 95 | 0 |
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| 2001 | 18.5 | 106 | 26.7 | 108 | 10.4 | 107 | 7.26 | 10 | 0 |
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| 2000 | 26.4 | 28 | 34.8 | 28 | 17.9 | 34 | 5.40 | 50 | 0 |
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| 1999 | 27.4 | 19 | 35.5 | 21 | 19.3 | 23 | 5.17 | 55 | 0 |
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| 1998 | 29.9 | 7 | 35.8 | 18 | 24 | 3 | 4.64 | 67 | 0 |
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| 1997 | 22.3 | 83 | 29.2 | 96 | 15.3 | 71 | 6.10 | 26 | 0 |
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| 1996 | 21.6 | 92 | 29.5 | 94 | 13.7 | 92 | 2.38 | 113 | 0 |
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| 1995 | 24.8 | 43 | 32 | 62 | 17.6 | 37 | 3.17 | 100 | 0 |
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| 1994 | 19.1 | 105 | 27.2 | 107 | 11 | 104 | 5.27 | 52 | 0 |
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| 1993 | 24 | 59 | 31.4 | 74 | 16.6 | 49 | 6.68 | 16 | 0 |
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| 1992 | 29.2 | 9 | 36.6 | 12 | 21.6 | 10 | 4.12 | 85 | 1 |
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| 1991 | 22.8 | 79 | 31.3 | 77 | 14.3 | 86 | 4.02 | 88 | 0 |
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| 1990 | 24 | 59 | 32.6 | 54 | 15.4 | 69 | 3.57 | 96 | 0 |
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| 1989 | 24.3 | 53 | 32.7 | 52 | 15.9 | 58 | 3.17 | 100 | 0 |
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| 1988 | 21.7 | 90 | 29.6 | 93 | 13.9 | 90 | 7.02 | 14 | 0 |
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| 1987 | 27.7 | 16 | 35.4 | 23 | 20 | 18 | 2.41 | 112 | 0 |
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| 1986 | 19.2 | 103 | 27.4 | 105 | 11 | 104 | 5.47 | 44 | 0 |
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| 1985 | 20.5 | 96 | 29.5 | 94 | 11.4 | 102 | 6.17 | 22 | 0 |
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| 1984 | 19.9 | 97 | 27.7 | 103 | 12.2 | 99 | 4.33 | 80 | 0 |
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| 1983 | 29.2 | 9 | 36.3 | 16 | 22.2 | 7 | 5.65 | 37 | 0 |
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| 1982 | 17 | 110 | 25.9 | 111 | 8.1 | 113 | 2.55 | 109 | 0 |
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| 1981 | 24.1 | 56 | 33 | 48 | 15.3 | 71 | 5.33 | 51 | 0 |
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| 1980 | 21.9 | 89 | 30.5 | 85 | 13.3 | 94 | 4.33 | 80 | 0 |
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| 1979 | 14.2 | 117 | 22.5 | 119 | 5.9 | 117 | 6.37 | 18 | 0 |
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| 1978 | 14.5 | 115 | 23.1 | 118 | 5.9 | 117 | 3.12 | 102 | 0 |
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| 1977 | 14.5 | 115 | 24.2 | 115 | 4.7 | 120 | 1.62 | 120 | 0 |
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| 1976 | 24.6 | 48 | 33.6 | 39 | 15.5 | 65 | 3.95 | 91 | 0 |
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| 1975 | 24.5 | 51 | 31.7 | 70 | 17.3 | 41 | 6.04 | 28 | 0 |
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| 1974 | 23 | 76 | 30.6 | 84 | 15.5 | 65 | 8.52 | 6 | 0 |
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| 1973 | 24.8 | 43 | 32 | 62 | 17.7 | 36 | 5.60 | 40 | 0 |
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| 1972 | 23 | 76 | 31 | 81 | 15 | 74 | 6.30 | 20 | 0 |
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| 1971 | 22 | 87 | 29.9 | 89 | 14.2 | 88 | 5.15 | 56 | 0 |
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| 1970 | 19.6 | 100 | 27.7 | 103 | 11.5 | 101 | 2.27 | 115 | 0 |
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| 1969 | 23.7 | 67 | 30.4 | 86 | 17 | 44 | 5.21 | 54 | 0 |
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| 1968 | 23.4 | 70 | 32 | 62 | 14.8 | 77 | 2.50 | 111 | 0 |
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| 1967 | 22.2 | 84 | 30.8 | 82 | 13.7 | 92 | 4.49 | 75 | 0 |
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| 1966 | 23.2 | 75 | 31.7 | 70 | 14.7 | 80 | 6.46 | 17 | 0 |
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| 1965 | 21.4 | 94 | 30.1 | 88 | 12.7 | 97 | 6.14 | 23 | 0 |
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| 1964 | 21.7 | 90 | 31.2 | 78 | 12.3 | 98 | 2.26 | 116 | 0 |
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| 1963 | 15.9 | 112 | 24.8 | 112 | 6.9 | 116 | 1.48 | 121 | 0 |
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| 1962 | 19.5 | 102 | 27.3 | 106 | 11.7 | 100 | 4.82 | 61 | 0 |
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| 1961 | 24.1 | 56 | 33.1 | 44 | 15 | 74 | 1.88 | 118 | 0 |
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| 1960 | 26.4 | 28 | 32.9 | 50 | 19.8 | 20 | 9.19 | 2 | 0 |
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| 1959 | 17.7 | 107 | 26.7 | 108 | 8.6 | 112 | 4.50 | 74 | 0 |
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| 1958 | 22.8 | 79 | 31.2 | 78 | 14.5 | 83 | 3.89 | 93 | 0 |
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| 1957 | 24.2 | 54 | 32.3 | 58 | 16 | 57 | 3.98 | 90 | 0 |
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| 1956 | 23.9 | 63 | 32.2 | 60 | 15.6 | 62 | 1.97 | 117 | 0 |
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| 1955 | 23.8 | 64 | 31.8 | 68 | 15.9 | 58 | 4.90 | 58 | 0 |
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| 1954 | 27.7 | 16 | 36.5 | 13 | 18.9 | 27 | 4.74 | 64 | 0 |
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| 1953 | 27.3 | 21 | 34.8 | 28 | 19.9 | 19 | 4.44 | 77 | 0 |
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| 1952 | 24.9 | 42 | 33.1 | 44 | 16.7 | 48 | 3.30 | 99 | 0 |
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| 1951 | 19.9 | 97 | 28.1 | 102 | 11.4 | 102 | 5.59 | 41 | 1 |
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| 1950 | 27.2 | 22 | 36.5 | 13 | 17.8 | 35 | 5.61 | 38 | 1 |
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| 1949 | 26.1 | 32 | 34.5 | 34 | 17.6 | 37 | 6.05 | 27 | 0 |
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| 1948 | 23.8 | 64 | 32.9 | 50 | 14.8 | 77 | 4.44 | 77 | 0 |
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| 1946 | 24 | 59 | 32.6 | 54 | 15.5 | 65 | 10.13 | 1 | 0 |
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| 1945 | 22.1 | 85 | 29.9 | 89 | 14.1 | 89 | 4.67 | 66 | 3 |
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| 1944 | 28.4 | 13 | 38 | 6 | 18.9 | 27 | 5.69 | 35 | 3 |
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| 1943 | 22.9 | 78 | 32.6 | 54 | 13.2 | 95 | 5.61 | 38 | 2 |
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| 1942 | 27 | 24 | 34.7 | 30 | 19.2 | 25 | 4.01 | 89 | 0 |
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| 1941 | 25.7 | 35 | 33.4 | 40 | 18 | 33 | 5.27 | 52 | 4 |
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| 1940 | 24.2 | 54 | 31.4 | 74 | 17 | 44 | 4.05 | 86 | 0 |
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| 1939 | 26.4 | 28 | 34.6 | 32 | 18.3 | 32 | 5.46 | 45 | 1 |
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| 1938 | 26 | 33 | 32.7 | 52 | 19.3 | 23 | 6.13 | 24 | 0 |
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| 1937 | 25.3 | 38 | 33.8 | 37 | 16.6 | 49 | 8.69 | 4 | 1 |
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| 1936 | 15.7 | 113 | 24.2 | 115 | 7.4 | 115 | 4.64 | 67 | 1 |
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| 1935 | 23.8 | 64 | 31.6 | 72 | 15.9 | 58 | 5.81 | 32 | 0 |
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| 1934 | 27 | 24 | 35.6 | 19 | 18.5 | 30 | 1.69 | 119 | 0 |
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| 1933 | 27.4 | 19 | 37.2 | 9 | 17.5 | 40 | 3.90 | 92 | 0 |
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| 1932 | 32.1 | 2 | 39.9 | 1 | 24.2 | 2 | 4.63 | 69 | 0 |
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| 1931 | 29.8 | 8 | 38 | 6 | 21.6 | 10 | 1.38 | 122 | 0 |
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| 1930 | 25.2 | 40 | 33.9 | 36 | 16.4 | 51 | 3.80 | 94 | 0 |
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| 1929 | 19.9 | 97 | 30.2 | 87 | 9.7 | 108 | 5.80 | 33 | 0 |
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| 1928 | 26.3 | 31 | 35 | 25 | 17.6 | 37 | 3.08 | 103 | 0 |
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| 1927 | 24.7 | 46 | 33.4 | 40 | 16.1 | 55 | 2.76 | 106 | 1 |
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| 1926 | 24.4 | 52 | 33.1 | 44 | 15.6 | 62 | 4.90 | 58 | 0 |
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| 1925 | 22.4 | 82 | 32 | 62 | 12.8 | 96 | 4.28 | 83 | 0 |
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| 1924 | 25.1 | 41 | 34.2 | 35 | 16.1 | 55 | 4.87 | 60 | 0 |
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| 1923 | 24 | 59 | 33.1 | 44 | 15 | 74 | 2.55 | 109 | 0 |
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| 1922 | 25.3 | 38 | 35.5 | 21 | 15.1 | 73 | 6.11 | 25 | 1 |
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| 1921 | 30.1 | 4 | 37.9 | 8 | 21.8 | 9 | 2.68 | 108 | 3 |
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| 1920 | 16 | 111 | 24.3 | 114 | 7.7 | 114 | 3.31 | 98 | 5 |
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| 1919 | 27.9 | 15 | 35.6 | 19 | 20.3 | 16 | 5.42 | 49 | 0 |
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| 1918 | | | | | | | 5.50 | 43 | 27 |
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| 1917 | 19.2 | 103 | 29.2 | 96 | 9.2 | 110 | 3.34 | 97 | 0 |
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| 1916 | 23.6 | 69 | 31.6 | 72 | 15.6 | 62 | 5.66 | 36 | 1 |
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| 1915 | 22.6 | 81 | 30.7 | 83 | 14.4 | 84 | 6.82 | 15 | 0 |
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| 1914 | 26.8 | 26 | 34.9 | 26 | 18.5 | 30 | 2.97 | 104 | 1 |
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| 1913 | 25.5 | 37 | 34.7 | 30 | 16.3 | 52 | 4.18 | 84 | 2 |
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| 1912 | 17.2 | 109 | 24.6 | 113 | 9.6 | 109 | 4.35 | 79 | 2 |
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| 1911 | 23.4 | 70 | 31.4 | 74 | 15.5 | 65 | 4.29 | 82 | 3 |
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| 1910 | 17.7 | 107 | 26.3 | 110 | 9 | 111 | 6.34 | 19 | 0 |
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| 1909 | | | | | 21 | 14 | 5.89 | 30 | 17 |
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| 1908 | 27.5 | 18 | 34.6 | 32 | 20.3 | 16 | 4.69 | 65 | 2 |
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| 1907 | | | | | | | 5.57 | 42 | 22 |
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| 1906 | | | 38.2 | 5 | 22.5 | 6 | 7.40 | 9 | 13 |
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| 1898 | 23.4 | 70 | 29.7 | 92 | 17.2 | 43 | 7.11 | 11 | 0 |
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| 1897 | | | 31.8 | 68 | 19.5 | 21 | 7.07 | 12 | 17 |
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| 1896 | | | | | | | 5.89 | 30 | 20 |
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| 1893 | | | | | | | | | 31 |
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