Every 1 September to 10 October in Belvidere, NJ 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 | 64.3 | 37 | 76.4 | 36 | 52.4 | 39 | 2.73 | 103 | 3 |
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| 2025 | | | | | | | 2.04 | 122 | 40 |
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| 2024 | 64.1 | 42 | 75.8 | 47 | 52.4 | 39 | 1.01 | 132 | 1 |
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| 2023 | 65 | 25 | 75.5 | 49 | 54.5 | 9 | 5.21 | 57 | 0 |
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| 2022 | 62.5 | 66 | 73.7 | 79 | 51.3 | 55 | 8.17 | 19 | 3 |
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| 2021 | 64.5 | 33 | 75.3 | 52 | 53.7 | 14 | 13.36 | 3 | 0 |
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| 2020 | 62 | 74 | 73.9 | 72 | 50 | 74 | 2.43 | 112 | 0 |
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| 2019 | 63.6 | 44 | 76.1 | 41 | 51.1 | 57 | 2.35 | 114 | 2 |
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| 2018 | 66.2 | 8 | 74.5 | 68 | 58.2 | 2 | 8.04 | 21 | 3 |
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| 2017 | 65.4 | 16 | 77.9 | 19 | 52.8 | 28 | 3.75 | 81 | 3 |
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| 2016 | 64.9 | 27 | 77.8 | 20 | 52.1 | 44 | 3.07 | 95 | 0 |
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| 2015 | 64.4 | 35 | 76.8 | 29 | 52 | 45 | 2.93 | 97 | 0 |
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| 2014 | | | 74.9 | 59 | | | 1.97 | 123 | 10 |
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| 2013 | 61.3 | 86 | 74.8 | 60 | 48.2 | 100 | 3.08 | 94 | 2 |
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| 2012 | 61.7 | 79 | 72.8 | 93 | 50.6 | 66 | 9.36 | 13 | 2 |
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| 2011 | 62.8 | 61 | 72.3 | 101 | 53.4 | 19 | 13.80 | 2 | 1 |
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| 2010 | 63.1 | 53 | 75.9 | 44 | 50.4 | 68 | 10.30 | 10 | 1 |
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| 2009 | 60.6 | 94 | 71.3 | 107 | 49.9 | 76 | 4.19 | 70 | 2 |
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| 2008 | 65.3 | 19 | 77.5 | 22 | 53 | 25 | 5.87 | 48 | 0 |
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| 2007 | 67.1 | 5 | 79.9 | 5 | 54.4 | 10 | 2.15 | 118 | 0 |
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| 2006 | | | | | | | | | 28 |
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| 2005 | | | 81.5 | 3 | | | 12.29 | 5 | 27 |
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| 2004 | | | | | | | 14.53 | 1 | 10 |
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| 2003 | 61.1 | 88 | 72.5 | 97 | 50.3 | 69 | 6.87 | 35 | 4 |
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| 2002 | 65.8 | 13 | 78.9 | 12 | 52.7 | 31 | 3.87 | 80 | 0 |
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| 2001 | | | 74.8 | 60 | | | 5.29 | 56 | 6 |
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| 2000 | 60.9 | 91 | 72.9 | 92 | 49.2 | 85 | 2.44 | 111 | 4 |
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| 1999 | | | 73.7 | 79 | | | 12.62 | 4 | 6 |
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| 1998 | 62.3 | 68 | 74.8 | 60 | 50.2 | 71 | 5.81 | 49 | 3 |
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| 1997 | | | 73.8 | 77 | | | 2.88 | 98 | 8 |
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| 1996 | 60.8 | 92 | 72.1 | 104 | 49.9 | 76 | 5.53 | 54 | 3 |
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| 1995 | | | 73.8 | 77 | | | 7.90 | 23 | 7 |
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| 1994 | 63.6 | 44 | 74 | 71 | 53.2 | 20 | 4.94 | 61 | 2 |
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| 1993 | 60.7 | 93 | 71.4 | 106 | 49.8 | 79 | 6.66 | 39 | 1 |
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| 1992 | | | 70.6 | 112 | | | 5.21 | 57 | 5 |
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| 1991 | 61.1 | 88 | 73.9 | 72 | 48.7 | 92 | 4.41 | 66 | 1 |
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| 1990 | | | 73.9 | 72 | | | 2.79 | 100 | 6 |
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| 1989 | | | 72.5 | 97 | | | 10.71 | 8 | 5 |
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| 1988 | 59.3 | 103 | 69.8 | 120 | 48.4 | 97 | 3.58 | 87 | 1 |
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| 1987 | | | 70.3 | 115 | | | 8.65 | 17 | 8 |
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| 1986 | | | 73.9 | 72 | 50.8 | 61 | 4.12 | 72 | 5 |
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| 1985 | 62.6 | 63 | 76.2 | 39 | 49.2 | 85 | 9.27 | 14 | 2 |
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| 1984 | 57.4 | 110 | 70 | 118 | 44.4 | 112 | 2.45 | 110 | 2 |
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| 1983 | 62.6 | 63 | 78.6 | 17 | 46.8 | 108 | 3.49 | 89 | 3 |
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| 1982 | 62.9 | 58 | 74.6 | 67 | 51.1 | 57 | 1.83 | 125 | 0 |
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| 1981 | 60.3 | 96 | 69.1 | 122 | 51.5 | 53 | 3.92 | 78 | 0 |
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| 1980 | 63.2 | 51 | 75.4 | 50 | 51 | 59 | 1.07 | 130 | 0 |
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| 1979 | 61.4 | 83 | 71.3 | 107 | 51.4 | 54 | 10.74 | 7 | 0 |
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| 1978 | 59.3 | 103 | 69.6 | 121 | 48.9 | 90 | 3.91 | 79 | 0 |
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| 1977 | 61.1 | 88 | 70.5 | 114 | 51.8 | 49 | 6.27 | 45 | 0 |
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| 1976 | 60.3 | 96 | 71.1 | 109 | 49.5 | 82 | 5.77 | 51 | 0 |
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| 1975 | 58.6 | 107 | 68.7 | 123 | 48.6 | 94 | 7.84 | 25 | 0 |
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| 1974 | 58.7 | 106 | 69.9 | 119 | 47.6 | 104 | 7.10 | 32 | 0 |
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| 1973 | 62.9 | 58 | 74.7 | 63 | 51.2 | 56 | 5.80 | 50 | 0 |
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| 1972 | 62.1 | 72 | 73.3 | 89 | 50.8 | 61 | 1.86 | 124 | 3 |
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| 1971 | 64.6 | 32 | 72.7 | 95 | 56.6 | 4 | 8.40 | 18 | 0 |
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| 1970 | 62.2 | 70 | 75.3 | 52 | 49.2 | 85 | 2.70 | 104 | 0 |
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| 1969 | 61.6 | 80 | 73.5 | 86 | 49.7 | 80 | 7.69 | 26 | 0 |
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| 1968 | 61.9 | 76 | 75.2 | 54 | 48.6 | 94 | 4.06 | 73 | 0 |
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| 1967 | 60.3 | 96 | 72.8 | 93 | 47.8 | 103 | 2.13 | 119 | 0 |
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| 1966 | 57.7 | 108 | 68.4 | 124 | 46.9 | 107 | 6.69 | 37 | 0 |
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| 1965 | 59.8 | 99 | 70.3 | 115 | 49.2 | 85 | 6.49 | 44 | 0 |
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| 1964 | 59.6 | 101 | 73 | 91 | 46.3 | 110 | 2.46 | 109 | 0 |
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| 1963 | 57.3 | 111 | 71 | 110 | 43.5 | 114 | 3.35 | 91 | 0 |
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| 1962 | 59.8 | 99 | 70.3 | 115 | 49.3 | 83 | 5.55 | 53 | 0 |
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| 1961 | 67 | 6 | 78.9 | 12 | 55.1 | 6 | 2.39 | 113 | 0 |
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| 1960 | 61.4 | 83 | 72.2 | 102 | 50.7 | 63 | 7.87 | 24 | 0 |
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| 1959 | 68.5 | 3 | 80 | 4 | 57 | 3 | 6.68 | 38 | 0 |
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| 1958 | 63 | 54 | 76.2 | 39 | 49.9 | 76 | 6.55 | 43 | 2 |
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| 1957 | 64.8 | 29 | 77.1 | 24 | 52.6 | 33 | 3.66 | 83 | 0 |
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| 1956 | | | | | | | 4.24 | 69 | 6 |
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| 1955 | 64.4 | 35 | 76.1 | 41 | 52.8 | 28 | 4.95 | 60 | 0 |
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| 1954 | 65.4 | 16 | 77 | 25 | 53.7 | 14 | 3.99 | 75 | 0 |
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| 1953 | 64.7 | 30 | 78.9 | 12 | 50.5 | 67 | 2.11 | 120 | 0 |
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| 1952 | 63 | 54 | 77.3 | 23 | 48.7 | 92 | 6.13 | 46 | 0 |
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| 1951 | 63.5 | 48 | 76.3 | 38 | 50.7 | 63 | 6.56 | 42 | 0 |
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| 1950 | 62.3 | 68 | 72.6 | 96 | 52 | 45 | 4.13 | 71 | 0 |
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| 1949 | 64.2 | 39 | 75.9 | 44 | 52.6 | 33 | 3.69 | 82 | 1 |
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| 1948 | 65.4 | 16 | 78 | 18 | 52.7 | 31 | 2.48 | 107 | 0 |
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| 1947 | 65.1 | 21 | 77.6 | 21 | 52.6 | 33 | 3.64 | 84 | 0 |
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| 1946 | 65.6 | 14 | 78.9 | 12 | 52.4 | 39 | 3.36 | 90 | 0 |
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| 1945 | 64.9 | 27 | 75.1 | 56 | 54.8 | 8 | 7.16 | 31 | 0 |
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| 1944 | 65.1 | 21 | 76.7 | 31 | 53.6 | 16 | 7.22 | 30 | 0 |
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| 1943 | 63 | 54 | 76.7 | 31 | 49.3 | 83 | 1.41 | 129 | 0 |
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| 1942 | 64.2 | 39 | 76.7 | 31 | 51.7 | 52 | 7.47 | 28 | 0 |
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| 1941 | 67.6 | 4 | 82 | 2 | 53.2 | 20 | 1.61 | 126 | 0 |
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| 1940 | 61.6 | 80 | 74.7 | 63 | 48.6 | 94 | 4.59 | 64 | 0 |
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| 1939 | 64.5 | 33 | 76.9 | 27 | 51.8 | 49 | 2.31 | 116 | 4 |
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| 1938 | 57.1 | 112 | 67.7 | 125 | 46.4 | 109 | 9.48 | 12 | 0 |
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| 1937 | 60.6 | 94 | 73.6 | 84 | 48.1 | 102 | 1.57 | 128 | 2 |
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| 1936 | 65.3 | 19 | 77 | 25 | 53.6 | 16 | 2.75 | 102 | 0 |
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| 1935 | | | | | | | 5.69 | 52 | 8 |
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| 1934 | 65.1 | 21 | 75.4 | 50 | 54.9 | 7 | 9.76 | 11 | 0 |
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| 1933 | | | | | | | 6.63 | 41 | 6 |
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| 1932 | 66 | 10 | 79.9 | 5 | 52 | 45 | 6.94 | 34 | 0 |
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| 1931 | 69.4 | 1 | 83.1 | 1 | 56 | 5 | 2.20 | 117 | 3 |
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| 1930 | 66 | 10 | 79.7 | 7 | 52.3 | 42 | 1.61 | 126 | 1 |
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| 1929 | 63.6 | 44 | 76.5 | 35 | 50.7 | 63 | 7.49 | 27 | 0 |
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| 1928 | 61.4 | 83 | 73.7 | 79 | 49.1 | 89 | 2.97 | 96 | 1 |
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| 1927 | 66 | 10 | 79.7 | 7 | 52 | 45 | 2.68 | 105 | 2 |
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| 1926 | 62.7 | 62 | 73.1 | 90 | 52.5 | 38 | 5.38 | 55 | 3 |
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| 1925 | 63.5 | 48 | 75.2 | 54 | 51.8 | 49 | 7.45 | 29 | 0 |
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| 1924 | 59.1 | 105 | 70.8 | 111 | 47.2 | 106 | 7.01 | 33 | 1 |
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| 1923 | 61.9 | 76 | 73.9 | 72 | 50 | 74 | 2.78 | 101 | 4 |
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| 1922 | 66.6 | 7 | 79.2 | 10 | 54.1 | 13 | 5.14 | 59 | 1 |
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| 1921 | 65.1 | 21 | 76.6 | 34 | 53.5 | 18 | 3.64 | 84 | 0 |
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| 1920 | | | | | | | 4.92 | 62 | 18 |
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| 1919 | 63.5 | 48 | 74.4 | 69 | 52.6 | 33 | 2.85 | 99 | 0 |
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| 1918 | | | 70.6 | 112 | 47.5 | 105 | 6.65 | 40 | 5 |
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| 1917 | 59.5 | 102 | 72.4 | 99 | 45.7 | 111 | 2.07 | 121 | 4 |
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| 1916 | 62.5 | 66 | 76.8 | 29 | 48.4 | 97 | 3.63 | 86 | 2 |
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| 1915 | 64.3 | 37 | 75.1 | 56 | 53.1 | 22 | 4.36 | 68 | 1 |
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| 1914 | 61.6 | 80 | 74.7 | 63 | 48.4 | 97 | 0.39 | 133 | 0 |
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| 1913 | 63.6 | 44 | 74.1 | 70 | 53.1 | 22 | 9.16 | 16 | 0 |
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| 1912 | | | 73.6 | 84 | | | 6.01 | 47 | 5 |
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| 1911 | 62.2 | 70 | 72.2 | 102 | 52.2 | 43 | 4.03 | 74 | 1 |
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| 1910 | 65 | 25 | 75.8 | 47 | 54.2 | 12 | 4.37 | 67 | 1 |
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| 1909 | 61.3 | 86 | 73.7 | 79 | 48.9 | 90 | 3.20 | 92 | 0 |
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| 1908 | 63 | 54 | 75.9 | 44 | 50.2 | 71 | 2.47 | 108 | 0 |
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| 1907 | 63.2 | 51 | 73.4 | 87 | 53.1 | 22 | 10.63 | 9 | 0 |
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| 1906 | 65.5 | 15 | 76.9 | 27 | 54.3 | 11 | 4.87 | 63 | 1 |
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| 1905 | | | | | | | 4.49 | 65 | 5 |
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| 1904 | | | | | | | 6.84 | 36 | 6 |
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| 1903 | 63.7 | 43 | 74.7 | 63 | 52.6 | 33 | 9.22 | 15 | 0 |
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| 1902 | 62.6 | 63 | 72.4 | 99 | 52.8 | 28 | 10.87 | 6 | 0 |
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| 1901 | 62.9 | 58 | 75 | 58 | 50.9 | 60 | 3.18 | 93 | 0 |
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| 1900 | 68.9 | 2 | 79.1 | 11 | 58.8 | 1 | 2.33 | 115 | 0 |
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| 1899 | 57.6 | 109 | 71.5 | 105 | 43.8 | 113 | 7.94 | 22 | 0 |
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| 1898 | 66.2 | 8 | 79.4 | 9 | 53 | 25 | 2.68 | 105 | 0 |
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| 1897 | 62.1 | 72 | 76 | 43 | 48.2 | 100 | 3.52 | 88 | 0 |
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| 1896 | 61.8 | 78 | 73.4 | 87 | 50.2 | 71 | 3.95 | 76 | 0 |
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| 1895 | 64.2 | 39 | 78.8 | 16 | 49.6 | 81 | 1.07 | 130 | 0 |
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| 1894 | 64.7 | 30 | 76.4 | 36 | 53 | 25 | 8.06 | 20 | 0 |
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| 1893 | 62 | 74 | 73.7 | 79 | 50.3 | 69 | 3.94 | 77 | 0 |
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