Every 1 September to 10 October in Glasgow, MT 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 | 60.6 | 11 | 73.3 | 35 | 47.9 | 7 | 2.24 | 23 | 0 |
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| 2025 | 63.1 | 4 | 78.6 | 4 | 47.6 | 8 | 0.25 | 116 | 0 |
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| 2024 | 65.3 | 1 | 80.7 | 1 | 50 | 2 | 1.60 | 39 | 0 |
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| 2023 | 62.9 | 7 | 76.3 | 14 | 49.5 | 3 | 1.09 | 55 | 0 |
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| 2022 | 63.3 | 3 | 77.9 | 6 | 48.6 | 4 | 0.86 | 70 | 0 |
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| 2021 | 63.1 | 4 | 78.9 | 2 | 47.3 | 9 | 0.04 | 127 | 0 |
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| 2020 | 59.4 | 21 | 73.9 | 25 | 45 | 19 | 1.07 | 56 | 0 |
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| 2019 | 55.4 | 71 | 65.1 | 114 | 45.6 | 16 | 4.79 | 2 | 0 |
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| 2018 | 52 | 114 | 62.8 | 120 | 41.1 | 80 | 2.31 | 21 | 0 |
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| 2017 | 55.1 | 76 | 67.6 | 92 | 42.6 | 47 | 1.87 | 29 | 0 |
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| 2016 | 55.1 | 76 | 66.1 | 105 | 44.1 | 27 | 4.01 | 6 | 0 |
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| 2015 | 59.6 | 19 | 73.6 | 32 | 45.7 | 14 | 1.41 | 43 | 0 |
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| 2014 | 55.4 | 71 | 68.2 | 88 | 42.7 | 44 | 0.84 | 71 | 0 |
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| 2013 | 60 | 16 | 73.3 | 35 | 46.7 | 10 | 1.83 | 30 | 0 |
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| 2012 | 56.7 | 51 | 71.8 | 51 | 41.6 | 66 | 0.25 | 116 | 0 |
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| 2011 | 61.7 | 9 | 76.9 | 11 | 46.4 | 11 | 0.70 | 85 | 0 |
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| 2010 | 57.1 | 46 | 69.2 | 75 | 44.9 | 22 | 1.77 | 33 | 0 |
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| 2009 | 58.4 | 28 | 72.6 | 42 | 44.3 | 26 | 0.68 | 89 | 0 |
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| 2008 | 56.6 | 53 | 71 | 56 | 42.2 | 53 | 1.76 | 34 | 0 |
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| 2007 | 55.7 | 69 | 69 | 79 | 42.4 | 51 | 2.49 | 19 | 0 |
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| 2006 | 55.9 | 63 | 68.7 | 83 | 43.2 | 36 | 3.27 | 9 | 0 |
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| 2005 | 56.7 | 51 | 69.9 | 67 | 43.4 | 34 | 1.02 | 61 | 0 |
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| 2004 | 57.1 | 46 | 72.4 | 45 | 41.8 | 61 | 0.28 | 115 | 0 |
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| 2003 | 56.8 | 50 | 71.9 | 48 | 41.8 | 61 | 0.78 | 76 | 0 |
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| 2002 | 55.9 | 63 | 69.4 | 71 | 42.5 | 49 | 1.18 | 48 | 0 |
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| 2001 | 58.3 | 30 | 71.8 | 51 | 44.7 | 24 | 0.40 | 107 | 0 |
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| 2000 | 53.9 | 93 | 67.7 | 91 | 40.1 | 93 | 0.94 | 67 | 0 |
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| 1999 | 52 | 114 | 65 | 115 | 39 | 103 | 1.12 | 52 | 0 |
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| 1998 | 62.1 | 8 | 75.7 | 16 | 48.6 | 4 | 2.62 | 18 | 0 |
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| 1997 | 60.1 | 13 | 74.6 | 21 | 45.6 | 16 | 0.60 | 94 | 0 |
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| 1996 | 54.3 | 85 | 66 | 106 | 42.5 | 49 | 2.94 | 14 | 0 |
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| 1995 | 54.7 | 80 | 68.7 | 83 | 40.8 | 88 | 0.69 | 86 | 0 |
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| 1994 | 59.2 | 23 | 73.5 | 33 | 45 | 19 | 1.07 | 56 | 0 |
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| 1993 | 52.7 | 108 | 66 | 106 | 39.5 | 99 | 1.04 | 59 | 0 |
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| 1992 | 55.8 | 67 | 70.4 | 62 | 41.3 | 76 | 0.90 | 69 | 0 |
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| 1991 | 56.5 | 54 | 70.1 | 65 | 42.9 | 40 | 0.68 | 89 | 0 |
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| 1990 | 60 | 16 | 75.1 | 18 | 44.8 | 23 | 0.16 | 122 | 0 |
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| 1989 | 55.3 | 73 | 69.4 | 71 | 41.2 | 79 | 0.78 | 76 | 0 |
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| 1988 | 56.1 | 60 | 69.9 | 67 | 42.2 | 53 | 0.95 | 66 | 0 |
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| 1987 | 57.6 | 41 | 72.5 | 44 | 42.7 | 44 | 0.66 | 92 | 0 |
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| 1986 | 51.6 | 117 | 60.1 | 126 | 43 | 38 | 4.51 | 3 | 0 |
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| 1985 | 47 | 128 | 56.7 | 128 | 37.3 | 118 | 1.32 | 45 | 0 |
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| 1984 | 53.2 | 105 | 65.4 | 112 | 41 | 85 | 0.81 | 73 | 0 |
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| 1983 | 53.7 | 97 | 65.9 | 108 | 41.5 | 69 | 0.97 | 64 | 0 |
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| 1982 | 53.6 | 100 | 65.8 | 109 | 41.4 | 74 | 1.46 | 41 | 0 |
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| 1981 | 58.2 | 31 | 72.8 | 38 | 43.7 | 31 | 0.20 | 121 | 0 |
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| 1980 | 58.2 | 31 | 72.6 | 42 | 43.8 | 30 | 0.91 | 68 | 0 |
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| 1979 | 60.6 | 11 | 75.5 | 17 | 45.7 | 14 | 0.35 | 113 | 0 |
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| 1978 | 56.1 | 60 | 68.6 | 85 | 43.6 | 32 | 4.20 | 5 | 0 |
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| 1977 | 51.6 | 117 | 62.1 | 122 | 41.1 | 80 | 2.70 | 16 | 0 |
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| 1976 | 57.6 | 41 | 73.5 | 33 | 41.8 | 61 | 0.48 | 101 | 0 |
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| 1975 | 55.2 | 75 | 69.3 | 73 | 41 | 85 | 1.07 | 56 | 0 |
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| 1974 | 53.9 | 93 | 67.6 | 92 | 40.2 | 92 | 0.21 | 119 | 0 |
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| 1973 | 54.7 | 80 | 66.7 | 102 | 42.8 | 42 | 1.65 | 37 | 0 |
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| 1972 | 53.3 | 104 | 66.6 | 104 | 40 | 95 | 0.78 | 76 | 0 |
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| 1971 | 55.6 | 70 | 69 | 79 | 42.2 | 53 | 0.55 | 98 | 0 |
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| 1970 | 53.8 | 95 | 67.3 | 96 | 40.3 | 91 | 1.67 | 36 | 0 |
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| 1969 | 57.7 | 38 | 70.5 | 60 | 45 | 19 | 1.53 | 40 | 0 |
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| 1968 | 54.6 | 83 | 68.5 | 86 | 40.7 | 90 | 0.77 | 79 | 0 |
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| 1967 | 58.8 | 27 | 71.3 | 55 | 46.3 | 12 | 3.19 | 11 | 0 |
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| 1966 | 59.3 | 22 | 73 | 37 | 45.6 | 16 | 0.48 | 101 | 0 |
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| 1965 | 50.1 | 124 | 61.4 | 125 | 38.9 | 105 | 0.79 | 74 | 0 |
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| 1964 | 53.8 | 95 | 67.4 | 95 | 40.1 | 93 | 0.54 | 99 | 0 |
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| 1963 | 63.8 | 2 | 77 | 10 | 50.6 | 1 | 0.39 | 108 | 0 |
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| 1962 | 56.2 | 58 | 69.2 | 75 | 43.2 | 36 | 0.67 | 91 | 0 |
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| 1961 | 50.7 | 121 | 62.6 | 121 | 38.8 | 106 | 2.04 | 27 | 0 |
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| 1960 | 59.1 | 24 | 73.8 | 27 | 44.5 | 25 | 0.05 | 126 | 0 |
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| 1959 | 51.4 | 120 | 62 | 123 | 40.8 | 88 | 2.22 | 24 | 0 |
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| 1958 | 56.2 | 58 | 70 | 66 | 42.4 | 51 | 0.37 | 110 | 0 |
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| 1957 | 54.2 | 87 | 67 | 99 | 41.5 | 69 | 0.52 | 100 | 0 |
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| 1956 | 56.1 | 60 | 70.5 | 60 | 41.7 | 65 | 0.10 | 124 | 0 |
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| 1955 | 56.4 | 55 | 71.9 | 48 | 40.9 | 87 | 0.42 | 106 | 0 |
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| 1954 | 54.5 | 84 | 66.9 | 100 | 42.1 | 56 | 1.14 | 51 | 0 |
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| 1953 | 59 | 26 | 75.1 | 18 | 42.9 | 40 | 0.33 | 114 | 0 |
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| 1952 | 57.9 | 36 | 73.8 | 27 | 42.1 | 56 | 0.79 | 74 | 0 |
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| 1951 | 53.5 | 101 | 67.1 | 98 | 40 | 95 | 1.45 | 42 | 0 |
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| 1950 | 55.3 | 73 | 68.8 | 82 | 41.8 | 61 | 3.46 | 8 | 0 |
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| 1949 | 55 | 78 | 70.8 | 57 | 39.2 | 101 | 0.60 | 94 | 0 |
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| 1948 | 60.1 | 13 | 76.2 | 15 | 44 | 28 | 0.38 | 109 | 0 |
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| 1947 | 56.3 | 56 | 69.7 | 69 | 43 | 38 | 0.57 | 96 | 0 |
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| 1946 | 54 | 90 | 66.7 | 102 | 41.3 | 76 | 3.14 | 12 | 0 |
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| 1945 | 54 | 90 | 69.3 | 73 | 38.7 | 107 | 1.17 | 49 | 0 |
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| 1944 | 57.4 | 44 | 72.2 | 47 | 42.6 | 47 | 0.96 | 65 | 0 |
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| 1943 | 60.1 | 13 | 78.8 | 3 | 41.4 | 74 | 0.01 | 128 | 1 |
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| 1942 | 57.1 | 46 | 72.7 | 41 | 41.5 | 69 | 1.03 | 60 | 0 |
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| 1941 | 52.3 | 112 | 65 | 115 | 39.7 | 98 | 1.12 | 52 | 0 |
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| 1940 | 61.7 | 9 | 77.3 | 8 | 46.1 | 13 | 0.69 | 86 | 0 |
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| 1939 | 57.2 | 45 | 72.8 | 38 | 41.6 | 66 | 1.20 | 47 | 1 |
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| 1938 | 63 | 6 | 78.1 | 5 | 48 | 6 | 5.03 | 1 | 1 |
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| 1937 | 57.7 | 38 | 72.8 | 38 | 42.7 | 44 | 3.04 | 13 | 0 |
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| 1936 | 59.1 | 24 | 77.1 | 9 | 41.1 | 80 | 0.43 | 104 | 0 |
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| 1935 | 58 | 35 | 76.7 | 12 | 39.2 | 101 | 0.37 | 110 | 0 |
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| 1934 | 54.1 | 89 | 70.7 | 58 | 37.5 | 117 | 0.75 | 80 | 0 |
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| 1933 | 58.2 | 31 | 73.7 | 29 | 42.8 | 42 | 0.72 | 83 | 0 |
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| 1932 | 54.7 | 80 | 71.9 | 48 | 37.6 | 116 | 0.25 | 116 | 1 |
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| 1931 | 57.1 | 46 | 72.3 | 46 | 42 | 58 | 2.02 | 28 | 0 |
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| 1930 | 55.8 | 67 | 70.4 | 62 | 41.1 | 80 | 1.82 | 31 | 0 |
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| 1929 | 53.5 | 101 | 69.2 | 75 | 37.8 | 114 | 1.40 | 44 | 0 |
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| 1928 | 55 | 78 | 73.7 | 29 | 36.2 | 125 | 0.36 | 112 | 0 |
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| 1927 | 54.3 | 85 | 67.2 | 97 | 41.5 | 69 | 3.72 | 7 | 0 |
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| 1926 | 52.3 | 112 | 65.8 | 109 | 38.7 | 107 | 2.28 | 22 | 0 |
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| 1925 | 52.4 | 110 | 65.3 | 113 | 39.8 | 97 | 4.25 | 4 | 1 |
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| 1924 | 54.2 | 87 | 70.3 | 64 | 38.1 | 111 | 0.69 | 86 | 1 |
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| 1923 | 58.2 | 31 | 74.3 | 23 | 42 | 58 | 0.84 | 71 | 0 |
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| 1922 | 59.6 | 19 | 77.7 | 7 | 41.6 | 66 | 0.75 | 80 | 1 |
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| 1921 | 53.7 | 97 | 68.1 | 89 | 39.3 | 100 | 1.63 | 38 | 0 |
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| 1920 | 60 | 16 | 76.5 | 13 | 43.6 | 32 | 1.16 | 50 | 0 |
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| 1919 | 57.7 | 38 | 73.9 | 25 | 41.5 | 69 | 0.63 | 93 | 0 |
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| 1918 | 56.3 | 56 | 73.7 | 29 | 39 | 103 | 0.98 | 63 | 0 |
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| 1917 | 58.4 | 28 | 74.8 | 20 | 41.9 | 60 | 1.01 | 62 | 0 |
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| 1916 | 50.1 | 124 | 63.6 | 118 | 36.6 | 123 | 2.75 | 15 | 0 |
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| 1915 | 51.5 | 119 | 63.9 | 117 | 38.7 | 107 | 2.15 | 25 | 1 |
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| 1914 | 55.9 | 63 | 70.7 | 58 | 41.1 | 80 | 2.65 | 17 | 0 |
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| 1913 | 53.5 | 101 | 69.6 | 70 | 37.3 | 118 | 2.46 | 20 | 0 |
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| 1912 | 48.3 | 127 | 59.9 | 127 | 37.2 | 120 | 1.11 | 54 | 1 |
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| 1911 | 54 | 90 | 66.8 | 101 | 41.3 | 76 | | | 0 |
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| 1907 | 52.6 | 109 | 69.2 | 75 | 36.1 | 127 | 0.46 | 103 | 0 |
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| 1906 | 57.5 | 43 | 71.8 | 51 | 43.3 | 35 | 1.78 | 32 | 0 |
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| 1905 | 57.8 | 37 | 71.5 | 54 | 44 | 28 | 0.72 | 83 | 3 |
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| 1904 | | | | | 37.9 | 113 | 0.43 | 104 | 7 |
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| 1903 | 52.8 | 107 | 67.5 | 94 | 38 | 112 | 0.21 | 119 | 0 |
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| 1902 | 53.7 | 97 | 74.2 | 24 | 33.5 | 129 | 0.15 | 123 | 1 |
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| 1901 | 49.6 | 126 | 61.9 | 124 | 37.8 | 114 | 2.13 | 26 | 2 |
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| 1900 | 50.7 | 121 | 63.4 | 119 | 38.3 | 110 | 1.27 | 46 | 1 |
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| 1899 | 55.9 | 63 | 74.6 | 21 | 37.1 | 121 | 0.06 | 125 | 0 |
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| 1898 | 50.5 | 123 | 65.5 | 111 | 35.7 | 128 | 3.22 | 10 | 2 |
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| 1897 | | | | | | | | | 12 |
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| 1896 | 52 | 114 | 67.8 | 90 | 36.2 | 125 | 0.57 | 96 | 0 |
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| 1895 | 52.4 | 110 | 68.4 | 87 | 36.3 | 124 | 0.74 | 82 | 0 |
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| 1894 | 53 | 106 | 68.9 | 81 | 37.1 | 121 | 1.73 | 35 | 0 |
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| 1893 | | | | | | | | | 30 |
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