Every July in Boise, ID from 1875 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 | 81 | 9 | 96.3 | 12 | 65.7 | 7 | 0.17 | 58 | 0 |
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| 2025 | 78.1 | 22 | 92.8 | 40 | 63.5 | 18 | 0.32 | 41 | 0 |
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| 2024 | 82.5 | 3 | 98.1 | 3 | 66.9 | 3 | 0.12 | 70 | 0 |
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| 2023 | 81.4 | 7 | 97.2 | 8 | 65.6 | 8 | trace | 120 | 0 |
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| 2022 | 80.7 | 11 | 97.1 | 9 | 64.4 | 12 | trace | 120 | 0 |
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| 2021 | 83.8 | 1 | 98.6 | 1 | 69 | 1 | 0.89 | 10 | 0 |
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| 2020 | 75.7 | 51 | 91.4 | 62 | 60.1 | 50 | 0.08 | 82 | 0 |
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| 2019 | 76.5 | 37 | 91.4 | 62 | 61.7 | 30 | 0.02 | 107 | 0 |
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| 2018 | 80.1 | 14 | 96.2 | 13 | 64 | 13 | 0.10 | 77 | 0 |
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| 2017 | 81.6 | 4 | 97.3 | 5 | 65.9 | 4 | 0.01 | 115 | 0 |
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| 2016 | 75.4 | 63 | 90.6 | 79 | 60.2 | 47 | 0.27 | 45 | 0 |
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| 2015 | 76.6 | 36 | 90.1 | 92 | 63 | 21 | 0.97 | 7 | 0 |
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| 2014 | 81 | 9 | 96.1 | 14 | 65.9 | 4 | 0.08 | 82 | 0 |
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| 2013 | 81.5 | 5 | 97.5 | 4 | 65.4 | 10 | 0.13 | 66 | 0 |
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| 2012 | 81.3 | 8 | 96.9 | 11 | 65.6 | 8 | 0.07 | 86 | 0 |
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| 2011 | 75.6 | 56 | 91.5 | 57 | 59.6 | 58 | 0.02 | 107 | 0 |
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| 2010 | 75.8 | 50 | 91.1 | 67 | 60.4 | 41 | 0.11 | 74 | 0 |
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| 2009 | 78.5 | 17 | 93.2 | 31 | 63.9 | 15 | 0.08 | 82 | 0 |
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| 2008 | 77.6 | 26 | 93.1 | 34 | 62.2 | 26 | 0.28 | 43 | 0 |
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| 2007 | 83.1 | 2 | 98.6 | 1 | 67.5 | 2 | 0.02 | 107 | 0 |
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| 2006 | 81.5 | 5 | 97.1 | 9 | 65.9 | 4 | 0.24 | 49 | 0 |
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| 2005 | 78.3 | 19 | 94.1 | 21 | 62.5 | 23 | 0.02 | 107 | 0 |
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| 2004 | 78 | 23 | 92.9 | 38 | 63.1 | 19 | 0.59 | 20 | 0 |
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| 2003 | 80.5 | 13 | 97.3 | 5 | 63.8 | 16 | 0.27 | 45 | 0 |
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| 2002 | 79.6 | 15 | 94.6 | 15 | 64.6 | 11 | 0.09 | 81 | 0 |
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| 2001 | 74.3 | 84 | 89.1 | 106 | 59.5 | 61 | 0.15 | 62 | 0 |
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| 2000 | 76 | 46 | 92 | 46 | 60.1 | 50 | 0.03 | 101 | 0 |
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| 1999 | 73.7 | 97 | 90 | 93 | 57.3 | 105 | trace | 120 | 0 |
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| 1998 | 79.2 | 16 | 94.6 | 15 | 63.8 | 16 | 0.49 | 24 | 0 |
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| 1997 | 72.7 | 115 | 87.3 | 130 | 58.2 | 88 | 0.45 | 30 | 0 |
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| 1996 | 76.7 | 35 | 93.1 | 34 | 60.4 | 41 | 0.12 | 70 | 0 |
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| 1995 | 73.4 | 102 | 89.3 | 102 | 57.5 | 101 | 0.59 | 20 | 0 |
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| 1994 | 76.9 | 31 | 93.9 | 23 | 60 | 53 | 0.10 | 77 | 0 |
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| 1993 | 65 | 149 | 79.6 | 151 | 50.4 | 149 | 0.52 | 23 | 0 |
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| 1992 | 71.3 | 130 | 87.6 | 125 | 55.1 | 134 | 0.03 | 101 | 0 |
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| 1991 | 75.7 | 51 | 93.6 | 26 | 57.8 | 93 | 0.37 | 38 | 0 |
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| 1990 | 76.1 | 44 | 93 | 37 | 59.3 | 67 | 0.42 | 31 | 0 |
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| 1989 | 76.9 | 31 | 94.4 | 18 | 59.5 | 61 | 0.03 | 101 | 0 |
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| 1988 | 74.6 | 79 | 93.2 | 31 | 56 | 125 | 0.02 | 107 | 0 |
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| 1987 | 71.2 | 132 | 86.5 | 134 | 55.9 | 126 | 0.70 | 16 | 0 |
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| 1986 | 69.6 | 144 | 85.3 | 142 | 53.9 | 142 | 0.17 | 58 | 0 |
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| 1985 | 77.7 | 25 | 93.9 | 23 | 61.5 | 31 | 0.85 | 11 | 0 |
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| 1984 | 74.2 | 87 | 89.9 | 96 | 58.4 | 81 | 0.23 | 51 | 0 |
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| 1983 | 69.4 | 146 | 84.7 | 144 | 54 | 141 | 1.16 | 4 | 0 |
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| 1982 | 70.1 | 141 | 84.6 | 145 | 55.6 | 129 | 1.62 | 2 | 0 |
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| 1981 | 71 | 133 | 88.7 | 114 | 53.2 | 145 | 0.23 | 51 | 0 |
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| 1980 | 72.9 | 112 | 89.5 | 99 | 56.3 | 123 | 0.03 | 101 | 0 |
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| 1979 | 74.1 | 88 | 90.4 | 88 | 57.8 | 93 | 0.01 | 115 | 0 |
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| 1978 | 72.8 | 114 | 88.7 | 114 | 56.9 | 113 | 0.48 | 26 | 0 |
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| 1977 | 72.7 | 115 | 88.3 | 122 | 57.1 | 109 | 0.41 | 32 | 0 |
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| 1976 | 73.1 | 108 | 89.5 | 99 | 56.7 | 116 | 1.15 | 5 | 0 |
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| 1975 | 78.3 | 19 | 94.3 | 19 | 62.3 | 25 | 0.82 | 13 | 0 |
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| 1974 | 73.8 | 94 | 89.6 | 97 | 58 | 90 | 0.53 | 22 | 0 |
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| 1973 | 75.5 | 60 | 91.9 | 49 | 59.2 | 71 | 0.07 | 86 | 0 |
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| 1972 | 73.5 | 100 | 89.6 | 97 | 57.4 | 103 | 0.21 | 55 | 0 |
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| 1971 | 74.7 | 78 | 90 | 93 | 59.4 | 66 | 0.12 | 70 | 0 |
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| 1970 | 76.3 | 40 | 92 | 46 | 60.6 | 37 | 0.28 | 43 | 0 |
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| 1969 | 72.9 | 112 | 89.3 | 102 | 56.5 | 120 | 0.02 | 107 | 0 |
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| 1968 | 77.3 | 29 | 94.1 | 21 | 60.5 | 38 | trace | 120 | 0 |
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| 1967 | 78.4 | 18 | 94.2 | 20 | 62.7 | 22 | 0.05 | 94 | 0 |
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| 1966 | 73.2 | 107 | 90.6 | 79 | 55.8 | 128 | 0.06 | 91 | 0 |
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| 1965 | 73.3 | 103 | 89 | 109 | 57.6 | 98 | 0.25 | 47 | 0 |
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| 1964 | 74.9 | 70 | 91.3 | 65 | 58.4 | 81 | 0.41 | 32 | 0 |
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| 1963 | 72.2 | 121 | 88.7 | 114 | 55.6 | 129 | trace | 120 | 0 |
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| 1962 | 72.2 | 121 | 87.6 | 125 | 56.8 | 115 | 0.04 | 97 | 0 |
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| 1961 | 76.2 | 42 | 93.2 | 31 | 59.3 | 67 | 0.25 | 47 | 0 |
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| 1960 | 80.7 | 11 | 97.3 | 5 | 64 | 13 | 0.95 | 8 | 0 |
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| 1959 | 76 | 46 | 92.3 | 44 | 59.7 | 57 | trace | 120 | 0 |
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| 1958 | 74 | 90 | 88.7 | 114 | 59.3 | 67 | 0.48 | 26 | 0 |
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| 1957 | 73.1 | 108 | 88.9 | 110 | 57.4 | 103 | trace | 120 | 0 |
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| 1956 | 75.1 | 65 | 90.8 | 73 | 59.5 | 61 | 0.15 | 62 | 0 |
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| 1955 | 71.3 | 130 | 86.1 | 141 | 56.4 | 122 | 0.39 | 36 | 0 |
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| 1954 | 75.3 | 64 | 91.5 | 57 | 59.2 | 71 | 0.06 | 91 | 0 |
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| 1953 | 74 | 90 | 91.1 | 67 | 57 | 111 | trace | 120 | 0 |
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| 1952 | 73.5 | 100 | 88.7 | 114 | 58.3 | 84 | 0.15 | 62 | 0 |
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| 1951 | 75.7 | 51 | 91.5 | 57 | 59.9 | 55 | 0.29 | 42 | 0 |
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| 1950 | 73.3 | 103 | 88.7 | 114 | 57.8 | 93 | 0.04 | 97 | 0 |
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| 1949 | 74.4 | 82 | 90.5 | 82 | 58.3 | 84 | trace | 120 | 0 |
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| 1948 | 70.3 | 138 | 86.2 | 139 | 54.5 | 138 | 0.08 | 82 | 0 |
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| 1947 | 75.1 | 65 | 91.8 | 51 | 58.4 | 81 | 0.00 | 144 | 0 |
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| 1946 | 74.9 | 70 | 91 | 71 | 58.7 | 79 | 0.04 | 97 | 0 |
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| 1945 | 74.9 | 70 | 91.5 | 57 | 58.3 | 84 | 0.07 | 86 | 0 |
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| 1944 | 72.3 | 119 | 87.3 | 130 | 57.2 | 108 | 0.06 | 91 | 0 |
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| 1943 | 73.3 | 103 | 88.9 | 110 | 57.6 | 98 | 0.16 | 60 | 0 |
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| 1942 | 75.7 | 51 | 91.9 | 49 | 59.5 | 61 | trace | 120 | 0 |
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| 1941 | 75.5 | 60 | 90.5 | 82 | 60.4 | 41 | 0.11 | 74 | 0 |
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| 1940 | 74.9 | 70 | 90.6 | 79 | 59.2 | 71 | 0.36 | 40 | 0 |
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| 1939 | 75.9 | 49 | 90.8 | 73 | 61 | 36 | 0.15 | 62 | 0 |
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| 1938 | 75.1 | 65 | 88.6 | 120 | 61.5 | 31 | 0.85 | 11 | 0 |
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| 1937 | 76.9 | 31 | 91.7 | 54 | 62.1 | 28 | 0.07 | 86 | 0 |
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| 1936 | 78.3 | 19 | 93.5 | 27 | 63.1 | 19 | 0.41 | 32 | 0 |
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| 1935 | 74.3 | 84 | 89.3 | 102 | 59.2 | 71 | 0.03 | 101 | 0 |
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| 1934 | 76.1 | 44 | 91.8 | 51 | 60.4 | 41 | 0.41 | 32 | 0 |
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| 1933 | 76.4 | 38 | 93.3 | 30 | 59.5 | 61 | trace | 120 | 0 |
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| 1932 | 73 | 111 | 88 | 124 | 57.9 | 91 | 0.91 | 9 | 0 |
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| 1931 | 77.4 | 27 | 93.7 | 25 | 61.1 | 35 | trace | 120 | 0 |
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| 1930 | 76 | 46 | 91.5 | 57 | 60.5 | 38 | trace | 120 | 0 |
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| 1929 | 74.9 | 70 | 90.7 | 77 | 59 | 75 | trace | 120 | 0 |
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| 1928 | 75.7 | 51 | 91.4 | 62 | 60 | 53 | 0.13 | 66 | 0 |
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| 1927 | 74.8 | 76 | 90.8 | 73 | 58.9 | 77 | trace | 120 | 0 |
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| 1926 | 76.8 | 34 | 92 | 46 | 61.5 | 31 | 0.21 | 55 | 0 |
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| 1925 | 78 | 23 | 93.5 | 27 | 62.5 | 23 | 0.37 | 38 | 0 |
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| 1924 | 73.9 | 92 | 89.4 | 101 | 58.5 | 80 | trace | 120 | 0 |
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| 1923 | 75.5 | 60 | 90.5 | 82 | 60.4 | 41 | 0.68 | 17 | 0 |
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| 1922 | 75.6 | 56 | 91.1 | 67 | 60.1 | 50 | 0.19 | 57 | 0 |
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| 1921 | 74.1 | 88 | 90.5 | 82 | 57.7 | 96 | trace | 120 | 0 |
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| 1920 | 76.2 | 42 | 91.8 | 51 | 60.5 | 38 | 0.05 | 94 | 0 |
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| 1919 | 75.6 | 56 | 92.1 | 45 | 59 | 75 | trace | 120 | 0 |
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| 1918 | 74.4 | 82 | 88.8 | 112 | 59.9 | 55 | 0.11 | 74 | 0 |
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| 1917 | 77.3 | 29 | 93.4 | 29 | 61.3 | 34 | trace | 120 | 0 |
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| 1916 | 70.8 | 135 | 86.2 | 139 | 55.4 | 133 | 0.81 | 14 | 0 |
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| 1915 | 70.5 | 137 | 84.4 | 146 | 56.5 | 120 | 0.63 | 18 | 0 |
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| 1914 | 75.1 | 65 | 90 | 93 | 60.2 | 47 | 1.04 | 6 | 0 |
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| 1913 | 70.2 | 140 | 82.9 | 148 | 57.5 | 101 | 2.01 | 1 | 0 |
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| 1912 | 68.8 | 148 | 82.8 | 149 | 54.8 | 137 | 1.27 | 3 | 0 |
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| 1911 | 73.7 | 97 | 88.6 | 120 | 58.8 | 78 | 0.05 | 94 | 0 |
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| 1910 | 75.6 | 56 | 91.1 | 67 | 60.2 | 47 | trace | 120 | 0 |
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| 1909 | 71.5 | 129 | 86.4 | 138 | 56.6 | 118 | 0.03 | 101 | 0 |
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| 1908 | 75 | 69 | 90.3 | 90 | 59.6 | 58 | 0.23 | 51 | 0 |
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| 1907 | 72.1 | 124 | 86.5 | 134 | 57.6 | 98 | 0.13 | 66 | 0 |
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| 1906 | 77.4 | 27 | 92.6 | 41 | 62.2 | 26 | 0.01 | 115 | 0 |
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| 1905 | 74.9 | 70 | 90.5 | 82 | 59.3 | 67 | 0.01 | 115 | 0 |
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| 1904 | 72.2 | 121 | 87.1 | 132 | 57.3 | 105 | 0.49 | 24 | 0 |
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| 1903 | 70 | 142 | 85 | 143 | 55 | 135 | 0.07 | 86 | 0 |
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| 1902 | 69.4 | 146 | 84.4 | 146 | 54.4 | 139 | 0.75 | 15 | 0 |
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| 1901 | 74.8 | 76 | 92.5 | 42 | 57 | 111 | trace | 120 | 0 |
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| 1900 | 72.3 | 119 | 89.1 | 106 | 55.5 | 132 | 0.02 | 107 | 0 |
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| 1899 | 74.5 | 81 | 90.8 | 73 | 58.2 | 88 | 0.01 | 115 | 0 |
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| 1898 | 73.1 | 108 | 92.9 | 38 | 53.4 | 144 | 0.00 | 144 | 0 |
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| 1897 | 70.6 | 136 | 88.8 | 112 | 52.4 | 146 | 0.16 | 60 | 0 |
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| 1896 | 76.4 | 38 | 92.4 | 43 | 60.4 | 41 | 0.10 | 77 | 0 |
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| 1895 | 69.5 | 145 | 86.6 | 133 | 52.4 | 146 | 0.38 | 37 | 0 |
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| 1894 | 73.8 | 94 | 90.4 | 88 | 57.1 | 109 | 0.00 | 144 | 0 |
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| 1893 | 70.9 | 134 | 87.4 | 128 | 54.4 | 139 | 0.10 | 77 | 0 |
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| 1892 | 70.3 | 138 | 89.3 | 102 | 51.4 | 148 | 0.00 | 144 | 0 |
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| 1891 | 73.6 | 99 | 90.5 | 82 | 56.7 | 116 | 0.48 | 26 | 0 |
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| 1890 | 73.9 | 92 | 91.6 | 55 | 56.3 | 123 | 0.00 | 144 | 0 |
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| 1889 | 74.3 | 84 | 93.1 | 34 | 55.6 | 129 | trace | 120 | 0 |
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| 1888 | 73.3 | 103 | 91.6 | 55 | 55 | 135 | 0.48 | 26 | 0 |
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| 1887 | 72 | 126 | 90.3 | 90 | 53.8 | 143 | 0.12 | 70 | 0 |
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| 1886 | 74.6 | 79 | 91 | 71 | 58.3 | 84 | 0.24 | 49 | 0 |
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| 1885 | 73.8 | 94 | 88.1 | 123 | 59.6 | 58 | 0.23 | 51 | 0 |
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| 1884 | 69.8 | 143 | 82.4 | 150 | 57.3 | 105 | 0.60 | 19 | 0 |
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| 1883 | | | | | | | 0.00 | 144 | 7 |
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| 1882 | 76.3 | 40 | 90.7 | 77 | 61.9 | 29 | trace | 120 | 0 |
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| 1881 | 72.5 | 118 | 89.1 | 106 | 55.9 | 126 | 0.13 | 66 | 0 |
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| 1880 | 71.7 | 128 | 86.5 | 134 | 56.9 | 113 | 0.02 | 107 | 0 |
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| 1879 | 72 | 126 | 87.5 | 127 | 56.6 | 118 | trace | 120 | 0 |
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| 1878 | 72.6 | 117 | 87.4 | 128 | 57.9 | 91 | 0.04 | 97 | 0 |
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| 1877 | 72.1 | 124 | 86.5 | 134 | 57.7 | 96 | | | 0 |
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| 1876 | | | 91.3 | 65 | | | | | 31 |
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| 1875 | | | 94.6 | 15 | | | | | 31 |
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