Every summer 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 | | | 84.2 | 35 | 59.6 | 52 | 18.66 | 18 | 10 |
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| 2025 | | | | | | | 7.78 | 124 | 92 |
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| 2024 | 73.5 | 12 | 84.8 | 26 | 62.1 | 7 | 14.78 | 48 | 2 |
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| 2023 | 71.1 | 55 | 81.9 | 71 | 60.4 | 34 | 25.28 | 2 | 2 |
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| 2022 | 73 | 17 | 84.8 | 26 | 61.1 | 17 | 8.37 | 117 | 2 |
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| 2021 | 70.9 | 61 | 82.6 | 62 | 59.3 | 60 | 20.19 | 12 | 1 |
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| 2020 | 72.9 | 20 | 85 | 23 | 61 | 22 | 14.70 | 49 | 7 |
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| 2019 | 71.9 | 35 | 83.3 | 50 | 60.5 | 31 | 16.43 | 32 | 7 |
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| 2018 | 72.3 | 30 | 83.1 | 52 | 61.2 | 16 | 18.45 | 20 | 4 |
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| 2017 | 69.9 | 78 | 81 | 88 | 58.9 | 67 | 15.92 | 37 | 2 |
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| 2016 | 72.2 | 31 | 84.4 | 32 | 59.8 | 46 | 9.90 | 97 | 4 |
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| 2015 | | | 80.9 | 92 | | | 18.11 | 23 | 38 |
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| 2014 | | | 81.5 | 79 | | | 11.51 | 84 | 26 |
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| 2013 | | | 80.5 | 99 | | | 17.77 | 25 | 14 |
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| 2012 | 71.5 | 40 | 82.8 | 57 | 60.2 | 37 | 10.57 | 91 | 4 |
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| 2011 | | | | | | | 21.26 | 9 | 39 |
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| 2010 | 72.5 | 28 | 83.9 | 41 | 61 | 22 | 9.60 | 102 | 0 |
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| 2009 | 69.4 | 90 | 79 | 116 | 59.7 | 49 | 16.37 | 34 | 3 |
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| 2008 | 73.4 | 13 | 85.2 | 19 | 61.7 | 10 | 8.31 | 119 | 3 |
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| 2007 | | | | | | | | | 79 |
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| 2006 | | | | | | | 19.34 | 15 | 36 |
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| 2005 | | | | | | | 9.07 | 111 | 24 |
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| 2004 | | | 80.9 | 92 | | | 15.98 | 36 | 23 |
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| 2003 | 71.9 | 35 | 83.1 | 52 | 60.5 | 31 | 24.59 | 3 | 3 |
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| 2002 | 74 | 5 | 86.6 | 8 | 61.1 | 17 | 9.42 | 106 | 3 |
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| 2001 | 71.3 | 50 | 83.7 | 44 | 59 | 63 | 9.64 | 100 | 6 |
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| 2000 | 68.6 | 100 | 79.1 | 115 | 58 | 91 | 16.41 | 33 | 3 |
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| 1999 | | | 86 | 15 | | | 6.03 | 128 | 10 |
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| 1998 | 71 | 60 | 81.7 | 74 | 60 | 42 | 11.92 | 81 | 9 |
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| 1997 | | | 81.2 | 84 | | | 12.85 | 66 | 12 |
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| 1996 | 69.3 | 92 | 79.6 | 110 | 59 | 63 | 14.02 | 54 | 5 |
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| 1995 | | | 83.4 | 48 | | | 8.16 | 121 | 11 |
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| 1994 | | | | | | | 18.30 | 21 | 19 |
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| 1993 | 71.4 | 48 | 82.8 | 57 | 60 | 42 | 7.36 | 125 | 1 |
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| 1992 | 67.3 | 107 | 78 | 120 | 56.6 | 103 | 12.59 | 70 | 0 |
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| 1991 | | | 82.8 | 57 | | | 8.56 | 114 | 10 |
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| 1990 | 70 | 76 | 80.2 | 103 | 59.8 | 46 | 15.77 | 40 | 2 |
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| 1989 | 69.9 | 78 | 79.3 | 114 | 60.5 | 31 | 15.27 | 44 | 7 |
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| 1988 | | | 84.1 | 37 | | | 12.51 | 71 | 19 |
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| 1987 | 71.5 | 40 | 82.5 | 64 | 60.3 | 36 | 13.18 | 63 | 4 |
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| 1986 | | | 80.9 | 92 | | | 17.32 | 26 | 14 |
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| 1985 | 68.3 | 103 | 80.2 | 103 | 56.2 | 105 | 13.29 | 62 | 2 |
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| 1984 | 70.3 | 68 | 81.7 | 74 | 58.9 | 67 | 14.94 | 47 | 6 |
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| 1983 | 71.1 | 55 | 85.1 | 21 | 57.2 | 100 | 8.02 | 122 | 1 |
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| 1982 | 67.4 | 106 | 79.5 | 111 | 55.3 | 110 | 12.11 | 77 | 4 |
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| 1981 | 70.2 | 71 | 80.8 | 95 | 59.7 | 49 | 9.34 | 107 | 0 |
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| 1980 | 70.9 | 61 | 81.7 | 74 | 59.9 | 45 | 8.24 | 120 | 2 |
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| 1979 | 68.5 | 101 | 78.2 | 119 | 58.9 | 67 | 9.63 | 101 | 1 |
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| 1978 | 68.8 | 98 | 79 | 116 | 58.7 | 76 | 16.56 | 31 | 1 |
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| 1977 | 68.7 | 99 | 79.5 | 111 | 57.8 | 95 | 12.06 | 78 | 0 |
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| 1976 | 69.4 | 90 | 79.7 | 108 | 59.1 | 61 | 11.69 | 82 | 0 |
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| 1975 | 70.2 | 71 | 79.7 | 108 | 60.6 | 29 | 24.18 | 6 | 0 |
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| 1974 | 69 | 95 | 79.8 | 107 | 58.2 | 87 | 15.47 | 42 | 1 |
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| 1973 | 71.3 | 50 | 81.2 | 84 | 61.4 | 14 | 13.48 | 58 | 0 |
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| 1972 | 68.4 | 102 | 78.3 | 118 | 58.6 | 79 | 12.06 | 78 | 0 |
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| 1971 | 69.5 | 88 | 81 | 88 | 58 | 91 | 13.36 | 60 | 0 |
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| 1970 | 69.2 | 93 | 80.8 | 95 | 57.5 | 98 | 9.98 | 95 | 0 |
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| 1969 | 69.1 | 94 | 80.4 | 100 | 57.8 | 95 | 19.45 | 14 | 0 |
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| 1968 | 69.7 | 84 | 81 | 88 | 58.4 | 84 | 9.11 | 110 | 0 |
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| 1967 | 70.1 | 74 | 80.6 | 98 | 59.6 | 52 | 22.24 | 7 | 0 |
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| 1966 | 70.4 | 65 | 84.8 | 26 | 56 | 107 | 5.43 | 130 | 0 |
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| 1965 | 67.2 | 108 | 80 | 106 | 54.4 | 111 | 6.88 | 127 | 0 |
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| 1964 | 67.5 | 105 | 79.4 | 113 | 55.6 | 108 | 7.91 | 123 | 0 |
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| 1963 | 67.9 | 104 | 80.3 | 102 | 55.6 | 108 | 9.52 | 104 | 0 |
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| 1962 | 69.6 | 86 | 81.2 | 84 | 58 | 91 | 10.90 | 88 | 0 |
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| 1961 | 71.1 | 55 | 82.3 | 65 | 60 | 42 | 15.86 | 39 | 0 |
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| 1960 | 69.9 | 78 | 81.4 | 80 | 58.4 | 84 | 15.54 | 41 | 0 |
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| 1959 | 72.6 | 25 | 83.5 | 47 | 61.7 | 10 | 15.15 | 45 | 0 |
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| 1958 | 71.8 | 37 | 84 | 40 | 59.6 | 52 | 12.47 | 72 | 0 |
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| 1957 | 73.4 | 13 | 87.3 | 4 | 59.5 | 57 | 5.82 | 129 | 0 |
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| 1956 | 72 | 34 | 84.1 | 37 | 59.8 | 46 | 19.25 | 16 | 0 |
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| 1955 | 75.3 | 2 | 88.3 | 1 | 62.4 | 5 | 13.61 | 57 | 0 |
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| 1954 | 72.6 | 25 | 86.4 | 11 | 58.9 | 67 | 10.07 | 94 | 0 |
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| 1953 | | | | | | | 9.21 | 109 | 17 |
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| 1952 | 73.4 | 13 | 86.6 | 8 | 60.2 | 37 | 12.67 | 69 | 0 |
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| 1951 | 71.1 | 55 | 83.7 | 44 | 58.6 | 79 | 22.23 | 8 | 1 |
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| 1950 | 71.5 | 40 | 83.9 | 41 | 59.1 | 61 | 10.69 | 90 | 0 |
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| 1949 | 75.9 | 1 | 88.2 | 2 | 63.6 | 2 | 13.33 | 61 | 0 |
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| 1948 | 73.3 | 16 | 84.9 | 25 | 61.6 | 12 | 13.83 | 56 | 0 |
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| 1947 | 72.7 | 24 | 84.3 | 34 | 61.1 | 17 | 13.02 | 64 | 0 |
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| 1946 | 70.8 | 64 | 82.9 | 55 | 58.8 | 72 | 16.96 | 29 | 0 |
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| 1945 | 71.7 | 38 | 82.7 | 61 | 60.6 | 29 | 24.33 | 5 | 0 |
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| 1944 | 74 | 5 | 87.2 | 5 | 60.7 | 28 | 8.65 | 113 | 0 |
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| 1943 | 74.8 | 3 | 87.5 | 3 | 62.1 | 7 | 14.10 | 51 | 0 |
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| 1942 | 72.1 | 32 | 83.4 | 48 | 60.8 | 24 | 21.19 | 10 | 0 |
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| 1941 | 71.5 | 40 | 84.4 | 32 | 58.7 | 76 | 14.31 | 50 | 0 |
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| 1940 | 70.9 | 61 | 82.9 | 55 | 58.9 | 67 | 16.65 | 30 | 0 |
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| 1939 | 72.9 | 20 | 85.2 | 19 | 60.8 | 24 | 9.92 | 96 | 3 |
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| 1938 | | | | | | | 20.84 | 11 | 14 |
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| 1937 | 73.7 | 9 | 85.9 | 16 | 61.4 | 14 | 24.55 | 4 | 0 |
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| 1936 | 73.7 | 9 | 87 | 6 | 60.2 | 37 | 15.92 | 37 | 4 |
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| 1935 | | | 85.3 | 18 | 63.8 | 1 | 18.24 | 22 | 10 |
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| 1934 | | | | | | | 11.57 | 83 | 19 |
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| 1933 | 74 | 5 | 86.5 | 10 | 60.8 | 24 | 15.15 | 45 | 7 |
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| 1932 | 73 | 17 | 86.3 | 12 | 59.6 | 52 | 9.59 | 103 | 5 |
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| 1931 | 74.1 | 4 | 86.2 | 13 | 62 | 9 | 12.77 | 68 | 6 |
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| 1930 | 72.8 | 23 | 86.8 | 7 | 59 | 63 | 9.82 | 99 | 5 |
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| 1929 | 71.5 | 40 | 85.1 | 21 | 57.8 | 95 | 9.90 | 97 | 2 |
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| 1928 | 72.6 | 25 | 84.1 | 37 | 61.1 | 17 | 29.69 | 1 | 0 |
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| 1927 | 69 | 95 | 81.7 | 74 | 56.3 | 104 | 17.25 | 27 | 0 |
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| 1926 | 70.4 | 65 | 82.1 | 68 | 58.6 | 79 | 12.01 | 80 | 3 |
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| 1925 | 72.5 | 28 | 86.1 | 14 | 58.8 | 72 | 12.17 | 76 | 1 |
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| 1924 | | | | | 57.1 | 101 | 9.03 | 112 | 17 |
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| 1923 | 69.9 | 78 | 82 | 70 | 57.9 | 94 | 9.52 | 104 | 6 |
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| 1922 | 71.2 | 54 | 82.2 | 67 | 60.2 | 37 | 14.09 | 52 | 1 |
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| 1921 | 71.4 | 48 | 82.3 | 65 | 60.4 | 34 | 11.27 | 85 | 1 |
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| 1920 | 69.7 | 84 | 80.2 | 103 | 59.4 | 58 | 17.96 | 24 | 5 |
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| 1919 | 70.2 | 71 | 80.8 | 95 | 59.6 | 52 | 19.06 | 17 | 2 |
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| 1918 | 70.3 | 68 | 81.9 | 71 | 58.5 | 82 | 8.43 | 116 | 4 |
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| 1917 | 72.1 | 32 | 83 | 54 | 61.1 | 17 | 12.78 | 67 | 2 |
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| 1916 | | | | | | | 13.42 | 59 | 18 |
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| 1915 | 70 | 76 | 81.1 | 87 | 58.8 | 72 | 12.88 | 65 | 0 |
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| 1914 | 70.3 | 68 | 81 | 88 | 59.7 | 49 | 13.86 | 55 | 0 |
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| 1913 | 71.7 | 38 | 84.6 | 30 | 58.8 | 72 | 12.36 | 74 | 0 |
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| 1912 | 70.1 | 74 | 82.1 | 68 | 58.1 | 88 | 9.27 | 108 | 0 |
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| 1911 | 71.5 | 40 | 82.8 | 57 | 60.2 | 37 | 16.25 | 35 | 0 |
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| 1910 | 69.8 | 83 | 81.4 | 80 | 58.1 | 88 | 8.37 | 117 | 0 |
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| 1909 | 68.9 | 97 | 81.7 | 74 | 56.1 | 106 | 7.25 | 126 | 4 |
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| 1908 | 71.5 | 40 | 83.6 | 46 | 59.4 | 58 | 12.26 | 75 | 0 |
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| 1907 | 69.6 | 86 | 81.9 | 71 | 57.4 | 99 | 10.36 | 93 | 0 |
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| 1906 | 72.9 | 20 | 82.6 | 62 | 63.1 | 3 | 10.74 | 89 | 0 |
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| 1905 | 71.1 | 55 | 81.4 | 80 | 60.8 | 24 | 10.50 | 92 | 0 |
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| 1904 | | | | | | | | | 14 |
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| 1903 | | | | | | | | | 30 |
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| 1902 | 69.5 | 88 | 80.4 | 100 | 58.7 | 76 | 16.97 | 28 | 0 |
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| 1901 | 73.7 | 9 | 85 | 23 | 62.3 | 6 | 14.08 | 53 | 0 |
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| 1900 | 74 | 5 | 85.5 | 17 | 62.5 | 4 | 10.99 | 86 | 0 |
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| 1899 | 70.4 | 65 | 83.8 | 43 | 57 | 102 | 10.97 | 87 | 0 |
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| 1898 | 73 | 17 | 84.6 | 30 | 61.5 | 13 | 15.38 | 43 | 0 |
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| 1897 | 69.9 | 78 | 81.3 | 83 | 58.5 | 82 | 18.59 | 19 | 0 |
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| 1896 | 71.3 | 50 | 83.2 | 51 | 59 | 63 | 20.02 | 13 | 2 |
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| 1895 | 71.3 | 50 | 84.2 | 35 | 58.4 | 84 | 12.42 | 73 | 0 |
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| 1894 | 71.5 | 40 | 84.8 | 26 | 58.1 | 88 | 8.48 | 115 | 0 |
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| 1893 | | | | | | | | | 61 |
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