Every 1 to 9 October in Hartford, CT from 1905 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 | 59.5 | 30 | 72 | 20 | 47 | 44 | 0.01 | 111 | 0 |
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| 2025 | 60.3 | 22 | 73.7 | 14 | 47 | 44 | 0.49 | 72 | 0 |
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| 2024 | 62.4 | 13 | 74.3 | 11 | 50.4 | 18 | 0.15 | 95 | 0 |
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| 2023 | 63.6 | 9 | 74.9 | 8 | 52.3 | 12 | 0.86 | 58 | 0 |
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| 2022 | 55.3 | 79 | 64.1 | 97 | 46.6 | 47 | 2.47 | 11 | 0 |
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| 2021 | 59.4 | 31 | 69.1 | 48 | 49.7 | 24 | 1.96 | 19 | 0 |
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| 2020 | 56.6 | 65 | 68 | 59 | 45.2 | 65 | 0.29 | 85 | 0 |
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| 2019 | 57 | 60 | 66.2 | 80 | 47.8 | 36 | 1.63 | 26 | 0 |
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| 2018 | 63.3 | 11 | 71 | 28 | 55.7 | 4 | 1.17 | 42 | 0 |
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| 2017 | 64.3 | 7 | 76.1 | 3 | 52.4 | 11 | 0.72 | 65 | 0 |
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| 2016 | 57.1 | 58 | 67.3 | 67 | 46.8 | 46 | 0.45 | 75 | 0 |
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| 2015 | 55.1 | 85 | 64.7 | 91 | 45.6 | 63 | 0.37 | 81 | 0 |
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| 2014 | 57.8 | 47 | 67.9 | 65 | 47.8 | 36 | 1.71 | 25 | 0 |
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| 2013 | 61.3 | 16 | 72.6 | 17 | 50.1 | 20 | 1.97 | 18 | 0 |
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| 2012 | 58 | 43 | 66.2 | 80 | 49.8 | 22 | 1.10 | 45 | 0 |
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| 2011 | 57 | 60 | 68.8 | 50 | 45.2 | 65 | 1.20 | 41 | 0 |
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| 2010 | 56.6 | 65 | 65.8 | 83 | 47.4 | 40 | 3.23 | 3 | 0 |
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| 2009 | 55.6 | 77 | 63.8 | 101 | 47.4 | 40 | 1.40 | 34 | 0 |
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| 2008 | 54.6 | 88 | 66.3 | 79 | 42.8 | 89 | 0.14 | 97 | 0 |
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| 2007 | 68.3 | 1 | 80 | 1 | 56.6 | 3 | 0.11 | 101 | 0 |
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| 2006 | 57.9 | 45 | 70.8 | 30 | 45.1 | 70 | 1.61 | 28 | 0 |
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| 2005 | 63.4 | 10 | 74.6 | 10 | 52.3 | 12 | 5.42 | 1 | 0 |
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| 2004 | 55.2 | 81 | 68.6 | 54 | 41.8 | 99 | 0.11 | 101 | 0 |
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| 2003 | 50 | 118 | 63 | 106 | 37 | 119 | 0.08 | 104 | 0 |
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| 2002 | 60.8 | 20 | 71.8 | 22 | 49.8 | 22 | 0.13 | 100 | 0 |
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| 2001 | 55.2 | 81 | 68.3 | 56 | 42 | 98 | 0.15 | 95 | 0 |
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| 2000 | 52.4 | 100 | 63 | 106 | 41.8 | 99 | 0.46 | 74 | 0 |
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| 1999 | 52.2 | 103 | 63.1 | 104 | 41.3 | 104 | 1.04 | 50 | 0 |
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| 1998 | 52.4 | 100 | 63.6 | 102 | 41.2 | 107 | 2.62 | 8 | 0 |
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| 1997 | 57.7 | 50 | 70.1 | 36 | 45.2 | 65 | 0.40 | 76 | 0 |
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| 1996 | 50.4 | 115 | 62.3 | 111 | 38.6 | 114 | 1.86 | 21 | 0 |
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| 1995 | 58.7 | 36 | 69.3 | 45 | 48 | 34 | 2.81 | 5 | 0 |
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| 1994 | 52.8 | 96 | 65 | 90 | 40.7 | 110 | 0.23 | 91 | 0 |
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| 1993 | 55.9 | 73 | 69.4 | 43 | 42.3 | 93 | 0.38 | 80 | 0 |
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| 1992 | 52.4 | 100 | 66.6 | 75 | 38.2 | 116 | 0.81 | 61 | 0 |
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| 1991 | 59.4 | 31 | 70.3 | 34 | 48.6 | 30 | 1.52 | 30 | 0 |
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| 1990 | 64.4 | 6 | 76.1 | 3 | 52.7 | 10 | 1.40 | 34 | 0 |
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| 1989 | 53.9 | 92 | 63.6 | 102 | 44.2 | 75 | 0.83 | 59 | 0 |
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| 1988 | 52.1 | 104 | 61.9 | 112 | 42.2 | 94 | 1.08 | 48 | 0 |
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| 1987 | 52.6 | 99 | 64.4 | 94 | 40.8 | 109 | 2.05 | 16 | 0 |
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| 1986 | 57 | 60 | 68 | 59 | 46 | 58 | 1.23 | 39 | 0 |
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| 1985 | 55.2 | 81 | 65.2 | 87 | 45.2 | 65 | 1.46 | 31 | 0 |
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| 1984 | 50.5 | 114 | 62.6 | 109 | 38.4 | 115 | 1.00 | 52 | 0 |
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| 1983 | 62.7 | 12 | 73.9 | 13 | 51.6 | 16 | 1.62 | 27 | 0 |
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| 1982 | 59.9 | 26 | 71.8 | 22 | 48.1 | 32 | 2.46 | 12 | 0 |
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| 1981 | 50.7 | 113 | 58.1 | 121 | 43.2 | 85 | 1.46 | 31 | 0 |
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| 1980 | 56.1 | 71 | 68 | 59 | 44.1 | 79 | 0.64 | 66 | 0 |
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| 1979 | 57.8 | 47 | 66.4 | 76 | 49.2 | 28 | 3.57 | 2 | 0 |
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| 1978 | 51.1 | 111 | 60.8 | 114 | 41.4 | 102 | 1.13 | 43 | 0 |
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| 1977 | 54.3 | 89 | 64.3 | 96 | 44.3 | 73 | 2.77 | 6 | 0 |
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| 1976 | 61 | 18 | 69.1 | 48 | 52.9 | 9 | 1.60 | 29 | 0 |
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| 1975 | 57.2 | 57 | 71 | 28 | 43.4 | 83 | trace | 112 | 0 |
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| 1974 | 48.7 | 121 | 62.8 | 108 | 34.7 | 121 | 0.03 | 107 | 0 |
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| 1973 | 59.7 | 28 | 73 | 16 | 46.4 | 49 | 0.89 | 56 | 0 |
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| 1972 | 55.3 | 79 | 67.3 | 67 | 43.2 | 85 | 3.18 | 4 | 0 |
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| 1971 | 59.3 | 33 | 72.3 | 19 | 46.2 | 52 | 0.04 | 105 | 0 |
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| 1970 | 58.3 | 40 | 70.4 | 33 | 46.1 | 56 | 0.78 | 63 | 0 |
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| 1969 | 57.8 | 47 | 69.4 | 43 | 46.2 | 52 | 1.12 | 44 | 0 |
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| 1968 | 55.2 | 81 | 66.9 | 73 | 43.4 | 83 | 0.89 | 56 | 0 |
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| 1967 | 58.4 | 38 | 71.2 | 27 | 45.7 | 60 | 0.02 | 108 | 0 |
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| 1966 | 56.3 | 69 | 68.3 | 56 | 44.2 | 75 | 1.21 | 40 | 0 |
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| 1965 | 49.8 | 119 | 61 | 113 | 38.7 | 113 | 2.29 | 15 | 0 |
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| 1964 | 50.2 | 117 | 63.1 | 104 | 37.3 | 118 | 0.40 | 76 | 0 |
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| 1963 | 59.2 | 34 | 74.9 | 8 | 43.6 | 81 | 0.14 | 97 | 0 |
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| 1962 | 56.6 | 65 | 65.9 | 82 | 47.2 | 42 | 2.56 | 9 | 0 |
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| 1961 | 57.6 | 52 | 69.9 | 38 | 45.2 | 65 | 1.10 | 45 | 0 |
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| 1960 | 51.3 | 110 | 66.4 | 76 | 36.2 | 120 | 0.14 | 97 | 0 |
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| 1959 | 64.3 | 7 | 71.7 | 24 | 57 | 2 | 2.32 | 14 | 0 |
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| 1958 | 51.1 | 111 | 64.1 | 97 | 38 | 117 | 0.99 | 53 | 0 |
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| 1957 | | | | | | | | | 1 |
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| 1956 | 52.1 | 104 | 63.9 | 100 | 40.3 | 111 | 1.09 | 47 | 0 |
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| 1955 | 57.1 | 58 | 67.8 | 66 | 46.4 | 49 | 1.98 | 17 | 0 |
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| 1954 | 60.3 | 22 | 72 | 20 | 48.7 | 29 | 0.00 | 117 | 0 |
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| 1953 | 54.7 | 87 | 68 | 59 | 41.3 | 104 | 1.04 | 50 | 0 |
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| 1952 | 56.1 | 71 | 67.3 | 67 | 44.8 | 72 | 0.63 | 67 | 0 |
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| 1951 | 60.3 | 22 | 69.3 | 45 | 51.3 | 17 | 2.43 | 13 | 0 |
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| 1950 | 60.9 | 19 | 74 | 12 | 47.8 | 36 | trace | 112 | 0 |
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| 1949 | 59.8 | 27 | 71.6 | 25 | 48 | 34 | 0.49 | 72 | 0 |
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| 1948 | 57.5 | 53 | 68.8 | 50 | 46.2 | 52 | 0.51 | 71 | 0 |
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| 1947 | 56.4 | 68 | 69.8 | 39 | 43 | 88 | 0.00 | 117 | 0 |
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| 1946 | 55.9 | 73 | 69.6 | 41 | 42.2 | 94 | 0.10 | 103 | 0 |
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| 1945 | 53.4 | 94 | 64.6 | 93 | 42.2 | 94 | 0.83 | 59 | 0 |
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| 1944 | 57.5 | 53 | 70.8 | 30 | 44.2 | 75 | 0.24 | 89 | 0 |
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| 1943 | 55.9 | 73 | 69.3 | 45 | 42.6 | 91 | 0.36 | 82 | 0 |
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| 1942 | 55.6 | 77 | 68.7 | 53 | 42.4 | 92 | 0.29 | 85 | 0 |
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| 1941 | 65.3 | 4 | 76 | 6 | 54.6 | 7 | 0.63 | 67 | 0 |
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| 1940 | 56.2 | 70 | 65.2 | 87 | 47.2 | 42 | 1.46 | 31 | 0 |
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| 1939 | 59.1 | 35 | 68 | 59 | 50.1 | 20 | 1.29 | 38 | 0 |
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| 1938 | 51.9 | 107 | 62.6 | 109 | 41.2 | 107 | trace | 112 | 0 |
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| 1937 | 55.9 | 73 | 65.3 | 86 | 46.4 | 49 | 0.22 | 93 | 0 |
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| 1936 | 58.1 | 42 | 68 | 59 | 48.1 | 32 | 1.35 | 37 | 0 |
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| 1935 | 49.7 | 120 | 59.8 | 117 | 39.7 | 112 | 0.33 | 83 | 0 |
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| 1934 | 54.8 | 86 | 65.2 | 87 | 44.3 | 73 | 0.91 | 55 | 0 |
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| 1933 | 58.3 | 40 | 67.3 | 67 | 49.3 | 27 | 0.55 | 69 | 0 |
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| 1932 | 61.8 | 14 | 71.3 | 26 | 52.2 | 15 | 0.80 | 62 | 0 |
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| 1931 | 64.9 | 5 | 76.1 | 3 | 53.7 | 8 | 0.24 | 89 | 0 |
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| 1930 | 53 | 95 | 64.7 | 91 | 41.3 | 104 | 0.00 | 117 | 0 |
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| 1929 | 51.9 | 107 | 60.7 | 115 | 43.2 | 85 | 2.74 | 7 | 0 |
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| 1928 | 57.7 | 50 | 68.8 | 50 | 46.6 | 47 | 0.28 | 87 | 0 |
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| 1927 | 66.6 | 2 | 75.9 | 7 | 57.2 | 1 | 1.73 | 24 | 0 |
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| 1926 | 58.6 | 37 | 66.7 | 74 | 50.4 | 18 | 0.31 | 84 | 0 |
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| 1925 | 51.6 | 109 | 59 | 120 | 44.1 | 79 | 1.90 | 20 | 0 |
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| 1924 | 57.3 | 55 | 68.6 | 54 | 46.1 | 56 | 0.18 | 94 | 0 |
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| 1923 | 52.7 | 97 | 64 | 99 | 41.4 | 102 | 0.00 | 117 | 0 |
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| 1922 | 66.3 | 3 | 77.6 | 2 | 55 | 6 | 0.95 | 54 | 0 |
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| 1921 | 57 | 60 | 66.4 | 76 | 47.6 | 39 | 0.39 | 78 | 0 |
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| 1920 | 57.9 | 45 | 70.1 | 36 | 45.8 | 59 | 0.02 | 108 | 0 |
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| 1919 | 58.4 | 38 | 67.3 | 67 | 49.4 | 26 | 0.54 | 70 | 0 |
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| 1918 | 53.8 | 93 | 65.4 | 85 | 42.1 | 97 | 0.39 | 78 | 0 |
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| 1917 | 52 | 106 | 60.4 | 116 | 43.6 | 81 | 0.74 | 64 | 0 |
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| 1916 | 59.7 | 28 | 73.7 | 14 | 45.7 | 60 | trace | 112 | 0 |
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| 1915 | 52.7 | 97 | 59.8 | 117 | 45.7 | 60 | 2.50 | 10 | 0 |
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| 1914 | 60.5 | 21 | 72.6 | 17 | 48.4 | 31 | 0.00 | 117 | 0 |
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| 1913 | 61.3 | 16 | 67.3 | 67 | 55.3 | 5 | 1.38 | 36 | 0 |
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| 1912 | 57.3 | 55 | 69.6 | 41 | 45.1 | 70 | trace | 112 | 0 |
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| 1911 | 50.4 | 115 | 59.2 | 119 | 41.6 | 101 | 1.81 | 22 | 0 |
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| 1910 | 61.5 | 15 | 70.7 | 32 | 52.3 | 12 | 0.25 | 88 | 0 |
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| 1909 | 58 | 43 | 69.8 | 39 | 46.2 | 52 | 0.02 | 108 | 0 |
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| 1908 | 54.2 | 91 | 65.6 | 84 | 42.8 | 89 | 0.04 | 105 | 0 |
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| 1907 | 54.3 | 89 | 64.4 | 94 | 44.2 | 75 | 1.79 | 23 | 0 |
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| 1906 | 56.8 | 64 | 68.1 | 58 | 45.4 | 64 | 1.08 | 48 | 0 |
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| 1905 | 60 | 25 | 70.3 | 34 | 49.7 | 24 | 0.23 | 91 | 0 |
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