Every May in Fort Wayne, IN from 1897 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 | 58.8 | 83 | 69.9 | 77 | 47.6 | 92 | 3.20 | 81 | 0 |
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| 2025 | 59.3 | 76 | 69.4 | 82 | 49.3 | 64 | 3.01 | 85 | 0 |
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| 2024 | 66.2 | 9 | 77.2 | 11 | 55.2 | 6 | 4.42 | 37 | 0 |
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| 2023 | 60.9 | 54 | 73.4 | 41 | 48.5 | 74 | 4.06 | 53 | 0 |
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| 2022 | 64.6 | 15 | 74.9 | 25 | 54.2 | 10 | 3.07 | 84 | 0 |
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| 2021 | 59.1 | 78 | 70 | 75 | 48.2 | 82 | 4.67 | 32 | 0 |
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| 2020 | 58.6 | 84 | 69.4 | 82 | 47.9 | 88 | 3.68 | 63 | 0 |
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| 2019 | 61.6 | 47 | 71.1 | 64 | 52.2 | 31 | 3.82 | 59 | 0 |
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| 2018 | 68.2 | 1 | 79.7 | 4 | 56.7 | 1 | 3.31 | 72 | 0 |
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| 2017 | 59.8 | 71 | 69.6 | 80 | 50 | 51 | 9.22 | 2 | 0 |
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| 2016 | 60.8 | 56 | 71.7 | 59 | 49.8 | 55 | 4.13 | 49 | 0 |
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| 2015 | 64.3 | 19 | 75.4 | 22 | 53.2 | 18 | 5.01 | 23 | 0 |
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| 2014 | 61.5 | 50 | 73.5 | 40 | 49.5 | 58 | 4.57 | 35 | 0 |
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| 2013 | 64.5 | 17 | 75.8 | 21 | 53.3 | 17 | 2.94 | 88 | 0 |
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| 2012 | 67 | 4 | 80.3 | 3 | 53.6 | 13 | 1.06 | 127 | 0 |
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| 2011 | 62.5 | 38 | 72.5 | 49 | 52.5 | 23 | 10.17 | 1 | 0 |
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| 2010 | 64.2 | 22 | 74.6 | 30 | 53.8 | 12 | 7.02 | 8 | 0 |
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| 2009 | 60.2 | 65 | 72.1 | 52 | 48.3 | 81 | 2.01 | 113 | 0 |
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| 2008 | 57.5 | 99 | 68.3 | 95 | 46.7 | 99 | 4.95 | 24 | 0 |
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| 2007 | 65 | 11 | 78.2 | 7 | 51.7 | 36 | 1.10 | 124 | 0 |
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| 2006 | 59 | 79 | 69 | 87 | 49.1 | 67 | 5.04 | 22 | 0 |
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| 2005 | 57.1 | 105 | 69 | 87 | 45.1 | 117 | 1.70 | 119 | 0 |
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| 2004 | 63.2 | 28 | 73.9 | 37 | 52.5 | 23 | 6.71 | 11 | 0 |
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| 2003 | 57.5 | 99 | 67.4 | 105 | 47.6 | 92 | 6.94 | 9 | 0 |
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| 2002 | 56.5 | 110 | 67.1 | 109 | 45.8 | 110 | 6.29 | 14 | 0 |
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| 2001 | 62.2 | 44 | 73.1 | 44 | 51.4 | 39 | 2.56 | 98 | 0 |
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| 2000 | 62.3 | 40 | 72.2 | 50 | 52.4 | 26 | 4.63 | 33 | 0 |
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| 1999 | 62.4 | 39 | 74.3 | 34 | 50.4 | 44 | 3.94 | 56 | 0 |
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| 1998 | 66.4 | 7 | 78.1 | 8 | 54.7 | 8 | 2.18 | 108 | 0 |
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| 1997 | 53.6 | 125 | 63.7 | 123 | 43.5 | 124 | 6.30 | 13 | 0 |
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| 1996 | 58.2 | 88 | 67.8 | 99 | 48.5 | 74 | 7.09 | 6 | 0 |
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| 1995 | 59 | 79 | 69.9 | 77 | 48.2 | 82 | 4.12 | 50 | 0 |
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| 1994 | 59.4 | 75 | 72.2 | 50 | 46.7 | 99 | 1.09 | 125 | 0 |
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| 1993 | 61.8 | 45 | 74.2 | 35 | 49.4 | 59 | 3.93 | 57 | 0 |
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| 1992 | 59.2 | 77 | 70.7 | 67 | 47.7 | 91 | 3.11 | 83 | 0 |
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| 1991 | 67.2 | 3 | 78.4 | 6 | 56.1 | 3 | 8.80 | 3 | 0 |
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| 1990 | 57.6 | 98 | 67.2 | 108 | 48 | 87 | 5.60 | 16 | 0 |
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| 1989 | 57.3 | 102 | 67.9 | 98 | 46.7 | 99 | 4.82 | 25 | 0 |
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| 1988 | 64.3 | 19 | 78.6 | 5 | 50 | 51 | 1.99 | 116 | 0 |
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| 1987 | 64.5 | 17 | 76.5 | 16 | 52.5 | 23 | 3.41 | 68 | 0 |
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| 1986 | 61.6 | 47 | 71.3 | 63 | 52 | 34 | 2.67 | 96 | 0 |
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| 1985 | 65 | 11 | 77.7 | 9 | 52.4 | 26 | 2.16 | 111 | 0 |
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| 1984 | 56.7 | 109 | 67 | 111 | 46.5 | 104 | 4.69 | 30 | 0 |
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| 1983 | 58 | 89 | 68.4 | 93 | 47.6 | 92 | 4.14 | 47 | 0 |
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| 1982 | 66.4 | 7 | 77.2 | 11 | 55.5 | 5 | 4.74 | 29 | 0 |
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| 1981 | 57 | 107 | 66.2 | 116 | 47.9 | 88 | 4.42 | 37 | 0 |
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| 1980 | 59.9 | 68 | 70.5 | 70 | 49.3 | 64 | 2.69 | 94 | 0 |
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| 1979 | 60.3 | 64 | 72 | 54 | 48.5 | 74 | 2.64 | 97 | 0 |
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| 1978 | 59.5 | 73 | 68.8 | 91 | 50.2 | 46 | 3.24 | 80 | 0 |
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| 1977 | 67.9 | 2 | 80.9 | 1 | 54.8 | 7 | 1.04 | 128 | 0 |
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| 1976 | 57.9 | 93 | 69.2 | 86 | 46.5 | 104 | 2.18 | 108 | 0 |
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| 1975 | 62.9 | 32 | 73.9 | 37 | 51.9 | 35 | 2.77 | 90 | 0 |
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| 1974 | 58 | 89 | 68.5 | 92 | 47.5 | 95 | 5.09 | 20 | 0 |
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| 1973 | 56.5 | 110 | 66.4 | 115 | 46.6 | 102 | 2.19 | 107 | 0 |
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| 1972 | 61.7 | 46 | 73.2 | 43 | 50.2 | 46 | 3.29 | 75 | 0 |
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| 1971 | 57.7 | 96 | 70 | 75 | 45.3 | 116 | 3.63 | 65 | 0 |
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| 1970 | 63.2 | 28 | 74.2 | 35 | 52.2 | 31 | 3.74 | 61 | 0 |
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| 1969 | 60.2 | 65 | 71.4 | 61 | 49.1 | 67 | 4.10 | 51 | 0 |
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| 1968 | 55.4 | 119 | 65.2 | 120 | 45.6 | 112 | 6.12 | 15 | 0 |
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| 1967 | 53.7 | 124 | 64 | 122 | 43.4 | 125 | 4.19 | 44 | 0 |
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| 1966 | 53 | 127 | 63.7 | 123 | 42.2 | 127 | 3.25 | 78 | 0 |
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| 1965 | 65 | 11 | 77 | 14 | 53.1 | 20 | 2.28 | 105 | 0 |
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| 1964 | 64.2 | 22 | 76.2 | 20 | 52.2 | 31 | 2.55 | 100 | 0 |
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| 1963 | 57.7 | 96 | 69.6 | 80 | 45.8 | 110 | 2.28 | 105 | 0 |
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| 1962 | 66.9 | 5 | 77.4 | 10 | 56.5 | 2 | 5.06 | 21 | 0 |
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| 1961 | 56.1 | 115 | 67.4 | 105 | 44.9 | 118 | 2.18 | 108 | 0 |
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| 1960 | 57.8 | 95 | 67.3 | 107 | 48.2 | 82 | 4.30 | 41 | 0 |
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| 1959 | 64.3 | 19 | 74.6 | 30 | 53.9 | 11 | 4.00 | 54 | 0 |
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| 1958 | 58.9 | 81 | 71.8 | 56 | 46.1 | 108 | 1.88 | 118 | 0 |
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| 1957 | 58.9 | 81 | 69.4 | 82 | 48.5 | 74 | 3.27 | 77 | 0 |
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| 1956 | 59.5 | 73 | 70.6 | 68 | 48.4 | 79 | 6.49 | 12 | 0 |
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| 1955 | 62.7 | 34 | 75.2 | 23 | 50.3 | 45 | 2.34 | 104 | 0 |
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| 1954 | 56 | 116 | 68.1 | 96 | 43.8 | 123 | 4.14 | 47 | 0 |
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| 1953 | 62.3 | 40 | 72.9 | 46 | 51.6 | 38 | 2.72 | 93 | 0 |
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| 1952 | 58 | 89 | 67.8 | 99 | 48.1 | 85 | 6.85 | 10 | 0 |
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| 1951 | 60.7 | 59 | 72.1 | 52 | 49.4 | 59 | 3.68 | 63 | 0 |
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| 1950 | 61.5 | 50 | 73.6 | 39 | 49.3 | 64 | 1.21 | 121 | 0 |
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| 1949 | 61.4 | 52 | 73.1 | 44 | 49.7 | 56 | 4.80 | 26 | 0 |
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| 1948 | 58 | 89 | 68.9 | 90 | 47 | 97 | 4.16 | 46 | 0 |
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| 1947 | 55.9 | 118 | 66.2 | 116 | 45.6 | 112 | 3.52 | 67 | 0 |
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| 1946 | 56.5 | 110 | 67.1 | 109 | 46 | 109 | 4.35 | 40 | 0 |
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| 1945 | 52.6 | 128 | 62.5 | 127 | 42.8 | 126 | 4.79 | 27 | 0 |
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| 1944 | 64.2 | 22 | 74.8 | 28 | 53.5 | 15 | 4.10 | 51 | 0 |
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| 1943 | 58.3 | 87 | 67.7 | 102 | 48.9 | 70 | 8.40 | 4 | 0 |
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| 1942 | 60.8 | 56 | 71.7 | 59 | 50 | 51 | 2.73 | 92 | 0 |
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| 1941 | 62.3 | 40 | 74.9 | 25 | 49.6 | 57 | 2.07 | 112 | 0 |
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| 1940 | 56.4 | 113 | 65.8 | 119 | 47.5 | 95 | 3.18 | 82 | 2 |
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| 1939 | 63.6 | 26 | 74.9 | 25 | 52.3 | 29 | 1.07 | 126 | 0 |
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| 1938 | 60.4 | 63 | 69.8 | 79 | 50.9 | 42 | 5.10 | 19 | 0 |
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| 1937 | 60.5 | 62 | 70.1 | 74 | 50.8 | 43 | 2.68 | 95 | 0 |
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| 1936 | 64.2 | 22 | 74.8 | 28 | 53.6 | 13 | 1.57 | 120 | 0 |
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| 1935 | 55.3 | 120 | 63.7 | 123 | 46.8 | 98 | 4.50 | 36 | 0 |
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| 1934 | 64.9 | 14 | 76.6 | 15 | 53.2 | 18 | 1.20 | 123 | 0 |
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| 1933 | 61.4 | 52 | 69.4 | 82 | 53.5 | 15 | 7.06 | 7 | 0 |
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| 1932 | 60.6 | 60 | 71 | 65 | 50.2 | 46 | 1.21 | 121 | 0 |
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| 1931 | 57.1 | 105 | 67.8 | 99 | 46.4 | 106 | 2.00 | 115 | 0 |
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| 1930 | 61.6 | 47 | 70.9 | 66 | 52.4 | 26 | 2.99 | 86 | 0 |
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| 1929 | 57.4 | 101 | 66.7 | 112 | 48.1 | 85 | 4.69 | 30 | 0 |
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| 1928 | 59.8 | 71 | 70.6 | 68 | 48.9 | 70 | 4.42 | 37 | 0 |
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| 1927 | 57.9 | 93 | 66.7 | 112 | 49 | 69 | 4.30 | 41 | 0 |
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| 1926 | 59.9 | 68 | 71.4 | 61 | 48.4 | 79 | 2.56 | 98 | 0 |
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| 1925 | 56 | 116 | 67.7 | 102 | 44.4 | 119 | 0.48 | 129 | 0 |
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| 1924 | 54 | 122 | 63.6 | 126 | 44.3 | 121 | 3.39 | 71 | 0 |
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| 1923 | 57.3 | 102 | 69 | 87 | 45.6 | 112 | 4.25 | 43 | 0 |
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| 1922 | 64.6 | 15 | 74.5 | 32 | 54.6 | 9 | 3.84 | 58 | 0 |
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| 1921 | 63.1 | 30 | 73.3 | 42 | 52.9 | 21 | 2.54 | 101 | 0 |
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| 1920 | 58.4 | 85 | 68.1 | 96 | 48.7 | 72 | 2.01 | 113 | 0 |
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| 1919 | 57.2 | 104 | 66.7 | 112 | 47.8 | 90 | 4.77 | 28 | 0 |
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| 1918 | 66 | 10 | 76.5 | 16 | 55.6 | 4 | 2.74 | 91 | 0 |
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| 1917 | 53.2 | 126 | 62.4 | 128 | 44 | 122 | 4.00 | 54 | 0 |
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| 1916 | 60.9 | 54 | 70.4 | 71 | 51.4 | 39 | 3.70 | 62 | 0 |
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| 1915 | 55.3 | 120 | 64.9 | 121 | 45.6 | 112 | 4.60 | 34 | 0 |
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| 1914 | 62.7 | 34 | 72.8 | 48 | 52.6 | 22 | 5.21 | 17 | 0 |
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| 1913 | 59.9 | 68 | 70.4 | 71 | 49.4 | 59 | 3.77 | 60 | 0 |
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| 1912 | 62.3 | 40 | 72.9 | 46 | 51.7 | 36 | 3.40 | 69 | 0 |
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| 1911 | 66.5 | 6 | 80.6 | 2 | 52.3 | 29 | 2.53 | 102 | 0 |
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| 1910 | 56.4 | 113 | 68.4 | 93 | 44.4 | 119 | 2.52 | 103 | 0 |
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| 1909 | 58.4 | 85 | 70.2 | 73 | 46.6 | 102 | 3.25 | 78 | 0 |
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| 1908 | | | | | | | 4.19 | 44 | 7 |
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| 1907 | 54 | 122 | 66.2 | 116 | 41.7 | 128 | 3.31 | 72 | 0 |
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| 1906 | 63.1 | 30 | 76.3 | 19 | 50 | 51 | 1.96 | 117 | 0 |
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| 1905 | 60.8 | 56 | 71.9 | 55 | 49.4 | 59 | 7.44 | 5 | 2 |
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| 1904 | 60.2 | 65 | 71.8 | 56 | 48.5 | 74 | 3.55 | 66 | 0 |
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| 1903 | 62.8 | 33 | 74.4 | 33 | 51.3 | 41 | 3.30 | 74 | 0 |
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| 1902 | 62.6 | 36 | 76.5 | 16 | 48.7 | 72 | 2.95 | 87 | 0 |
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| 1900 | 63.6 | 26 | 77.2 | 11 | 50.1 | 49 | 3.40 | 69 | 0 |
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| 1899 | 62.6 | 36 | 75.1 | 24 | 50.1 | 49 | 2.83 | 89 | 0 |
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| 1898 | 60.6 | 60 | 71.8 | 56 | 49.4 | 59 | 5.21 | 17 | 0 |
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| 1897 | 57 | 107 | 67.5 | 104 | 46.4 | 106 | 3.28 | 76 | 0 |
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