Every July in El Cajon, CA from 1899 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 | 77.1 | 8 | 88.3 | 46 | 65.9 | 7 | trace | 41 | 0 |
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| 2025 | 72.8 | 76 | 83 | 110 | 62.7 | 34 | 0.00 | 66 | 0 |
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| 2024 | 76.5 | 14 | 88.7 | 39 | 64.3 | 13 | 0.00 | 66 | 0 |
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| 2023 | 76.3 | 17 | 88.6 | 40 | 64 | 16 | 0.00 | 66 | 0 |
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| 2022 | 74.3 | 44 | 84.8 | 96 | 63.9 | 19 | 0.00 | 66 | 0 |
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| 2021 | 76.6 | 13 | 87.3 | 68 | 66 | 6 | 0.12 | 15 | 0 |
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| 2020 | 75.4 | 27 | 87.4 | 66 | 63.5 | 24 | 0.00 | 66 | 0 |
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| 2019 | 74.9 | 36 | 85.8 | 85 | 64 | 16 | 0.00 | 66 | 0 |
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| 2018 | 79.4 | 2 | 90.7 | 12 | 68 | 1 | 0.00 | 66 | 0 |
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| 2017 | 77.3 | 5 | 87.8 | 53 | 66.8 | 4 | 0.00 | 66 | 0 |
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| 2016 | 76.9 | 10 | 88.3 | 46 | 65.6 | 9 | 0.00 | 66 | 0 |
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| 2015 | 74.8 | 37 | 83.8 | 104 | 65.8 | 8 | 0.57 | 5 | 0 |
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| 2014 | 77.1 | 8 | 87.7 | 60 | 66.5 | 5 | 0.00 | 66 | 0 |
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| 2013 | 74 | 51 | 83.8 | 104 | 64.3 | 13 | 0.00 | 66 | 0 |
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| 2012 | 72.9 | 75 | 84.6 | 99 | 61.2 | 51 | 0.00 | 66 | 0 |
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| 2011 | 74.1 | 49 | 84.8 | 96 | 63.4 | 27 | 0.00 | 66 | 0 |
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| 2010 | 72.6 | 82 | 83.9 | 103 | 61.2 | 51 | 0.00 | 66 | 1 |
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| 2009 | 76.5 | 14 | 89.1 | 35 | 63.9 | 19 | 0.00 | 66 | 0 |
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| 2008 | | | | | 59 | 75 | 0.00 | 66 | 5 |
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| 2007 | 75.9 | 22 | 88.4 | 44 | 63.4 | 27 | 0.00 | 66 | 3 |
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| 2006 | 80.9 | 1 | 94.1 | 1 | 67.6 | 2 | 1.90 | 1 | 0 |
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| 2005 | 76.3 | 17 | 90.5 | 15 | 62.2 | 40 | 0.28 | 9 | 0 |
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| 2004 | 76 | 20 | 88.9 | 38 | 63.3 | 29 | 0.00 | 66 | 1 |
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| 2003 | 75.8 | 23 | 88.6 | 40 | 63.1 | 30 | 0.72 | 3 | 2 |
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| 2002 | | | 85 | 94 | 62 | 44 | 0.00 | 66 | 4 |
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| 2001 | 74 | 51 | 86 | 84 | 62.1 | 43 | 0.38 | 6 | 0 |
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| 2000 | | | | | 61 | 56 | 0.00 | 66 | 4 |
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| 1999 | 75 | 33 | 87.8 | 53 | 61.8 | 47 | 0.00 | 66 | 1 |
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| 1997 | 74.5 | 41 | 86.4 | 79 | 62.6 | 37 | 0.02 | 35 | 1 |
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| 1996 | 77.3 | 5 | 90.9 | 11 | 63.6 | 22 | 0.05 | 27 | 2 |
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| 1995 | 74.3 | 44 | 88.3 | 46 | 60.2 | 64 | 0.02 | 35 | 2 |
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| 1994 | 73.9 | 54 | 84.3 | 101 | 63.5 | 24 | 0.06 | 24 | 3 |
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| 1993 | 72.8 | 76 | 81.6 | 113 | 64 | 16 | 0.00 | 66 | 1 |
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| 1992 | | | | | 65 | 11 | 0.07 | 21 | 4 |
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| 1991 | 71.8 | 95 | 81.6 | 113 | 62 | 44 | 0.68 | 4 | 0 |
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| 1990 | | | | | 64.1 | 15 | 0.03 | 32 | 4 |
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| 1989 | | | | | 62.4 | 38 | 0.00 | 66 | 6 |
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| 1988 | | | | | 63.6 | 22 | 0.00 | 66 | 4 |
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| 1987 | | | | | | | trace | 41 | 7 |
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| 1986 | | | | | 61.5 | 49 | trace | 41 | 4 |
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| 1985 | | | | | 65.1 | 10 | 0.00 | 66 | 4 |
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| 1984 | 79.4 | 2 | 91 | 7 | 67.6 | 2 | 0.00 | 66 | 3 |
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| 1983 | 74.3 | 44 | 89.4 | 28 | 59.1 | 72 | 0.00 | 66 | 0 |
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| 1982 | 75 | 33 | 89.2 | 34 | 61.1 | 54 | 0.00 | 66 | 2 |
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| 1981 | 77.5 | 4 | 90.3 | 16 | 64.8 | 12 | trace | 41 | 1 |
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| 1980 | 77.2 | 7 | 91.5 | 6 | 62.9 | 32 | 0.00 | 66 | 0 |
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| 1979 | | | | | 59.9 | 67 | 0.00 | 66 | 6 |
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| 1978 | 74.8 | 37 | 89.5 | 24 | 60 | 66 | 0.00 | 66 | 1 |
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| 1977 | 75.3 | 28 | 88.3 | 46 | 62.2 | 40 | 0.00 | 66 | 0 |
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| 1976 | 73.6 | 59 | 83.7 | 107 | 63.5 | 24 | 0.01 | 38 | 0 |
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| 1975 | 73.4 | 63 | 85.7 | 86 | 60.7 | 58 | trace | 41 | 2 |
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| 1974 | 74.8 | 37 | 86.8 | 75 | 62.8 | 33 | 0.01 | 38 | 1 |
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| 1973 | 72 | 92 | 83.6 | 108 | 60.4 | 61 | 0.00 | 66 | 0 |
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| 1972 | 76.7 | 11 | 89.6 | 23 | 63.7 | 21 | 0.00 | 66 | 1 |
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| 1971 | 74.2 | 48 | 87.3 | 68 | 61.2 | 51 | trace | 41 | 0 |
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| 1970 | 76 | 20 | 89 | 36 | 63 | 31 | 0.00 | 66 | 0 |
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| 1969 | 74.6 | 40 | 87 | 73 | 62.2 | 40 | trace | 41 | 0 |
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| 1968 | 75.2 | 31 | 87.6 | 62 | 62.7 | 34 | 0.09 | 17 | 1 |
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| 1967 | 75 | 33 | 87.3 | 68 | 62.7 | 34 | 0.04 | 28 | 0 |
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| 1966 | 73.6 | 59 | 87.1 | 72 | 60.2 | 64 | trace | 41 | 1 |
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| 1965 | 70.9 | 102 | 84.4 | 100 | 57.4 | 96 | 0.07 | 21 | 0 |
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| 1964 | 74.3 | 44 | 89.7 | 22 | 58.9 | 76 | trace | 41 | 1 |
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| 1963 | 72.1 | 90 | 86.5 | 78 | 57.7 | 90 | 0.00 | 66 | 0 |
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| 1962 | 72.6 | 82 | 85.4 | 89 | 59.9 | 67 | trace | 41 | 0 |
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| 1961 | 73.9 | 54 | 85.5 | 88 | 62.4 | 38 | trace | 41 | 0 |
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| 1960 | 76.3 | 17 | 91 | 7 | 61.9 | 46 | trace | 41 | 1 |
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| 1959 | 76.7 | 11 | 92.1 | 3 | 61.3 | 50 | trace | 41 | 0 |
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| 1958 | 72.5 | 84 | 88.3 | 46 | 56.6 | 110 | trace | 41 | 0 |
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| 1957 | 74.1 | 49 | 91 | 7 | 57.1 | 100 | trace | 41 | 0 |
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| 1956 | 72.7 | 80 | 87.8 | 53 | 57.6 | 93 | 0.03 | 32 | 0 |
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| 1955 | 70.7 | 104 | 85.1 | 93 | 56.3 | 113 | 0.09 | 17 | 0 |
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| 1954 | 75.5 | 25 | 90.6 | 14 | 60.3 | 63 | 0.13 | 13 | 1 |
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| 1953 | 74.4 | 43 | 89.3 | 31 | 59.5 | 70 | 0.07 | 21 | 1 |
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| 1952 | 73.3 | 64 | 89.8 | 18 | 56.6 | 110 | 0.00 | 66 | 1 |
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| 1951 | 72.2 | 89 | 87 | 73 | 57.4 | 96 | 0.00 | 66 | 0 |
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| 1950 | 71.7 | 97 | 86.2 | 81 | 57.2 | 99 | 0.00 | 66 | 1 |
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| 1949 | 70.7 | 104 | 84.7 | 98 | 56.6 | 110 | 0.00 | 66 | 0 |
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| 1948 | 69.6 | 109 | 86.2 | 81 | 53 | 123 | 0.00 | 66 | 1 |
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| 1947 | 72.3 | 86 | 91.6 | 5 | 53.1 | 122 | 0.00 | 66 | 2 |
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| 1946 | 73.3 | 64 | 89 | 36 | 57.5 | 94 | trace | 41 | 1 |
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| 1945 | | | 85.6 | 87 | 58.2 | 81 | trace | 41 | 4 |
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| 1944 | 69.9 | 108 | 85 | 94 | 54.7 | 120 | 0.00 | 66 | 0 |
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| 1943 | 72.8 | 76 | 88.2 | 51 | 57.1 | 100 | 0.00 | 66 | 1 |
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| 1942 | 73.5 | 62 | 89.8 | 18 | 57.1 | 100 | trace | 41 | 0 |
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| 1941 | 73.2 | 68 | 89.3 | 31 | 57 | 104 | 0.06 | 24 | 0 |
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| 1940 | 73.1 | 70 | 89.8 | 18 | 56.3 | 113 | 0.00 | 66 | 0 |
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| 1939 | 72.8 | 76 | 87.5 | 64 | 58.4 | 78 | 0.00 | 66 | 1 |
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| 1938 | 72.1 | 90 | 86.1 | 83 | 58 | 85 | 0.13 | 13 | 0 |
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| 1937 | 73.2 | 68 | 87.8 | 53 | 59.1 | 72 | 0.09 | 17 | 1 |
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| 1936 | 75.5 | 25 | 89.5 | 24 | 61.1 | 54 | 0.20 | 10 | 1 |
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| 1935 | 73.1 | 70 | 89.3 | 31 | 56.9 | 106 | 0.00 | 66 | 0 |
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| 1934 | 73.3 | 64 | 88.2 | 51 | 58.7 | 77 | 0.00 | 66 | 1 |
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| 1933 | 72.3 | 86 | 84.3 | 101 | 60.4 | 61 | trace | 41 | 0 |
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| 1932 | 69.1 | 111 | 82.6 | 112 | 55.6 | 116 | 0.00 | 66 | 0 |
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| 1931 | 75.6 | 24 | 89.4 | 28 | 61.8 | 47 | 0.02 | 35 | 0 |
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| 1930 | 73.7 | 58 | 89.8 | 18 | 57.7 | 90 | 0.04 | 28 | 0 |
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| 1929 | | | | | | | 0.00 | 66 | 7 |
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| 1928 | 73.1 | 70 | 88.6 | 40 | 57.7 | 90 | 0.00 | 66 | 0 |
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| 1927 | 75.3 | 28 | 92.6 | 2 | 58.1 | 82 | trace | 41 | 0 |
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| 1926 | 72.7 | 80 | 87.5 | 64 | 57.8 | 89 | 0.12 | 15 | 0 |
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| 1925 | 75.3 | 28 | 89.9 | 17 | 60.7 | 58 | 0.01 | 38 | 0 |
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| 1924 | 72 | 92 | 87.2 | 71 | 56.8 | 108 | trace | 41 | 0 |
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| 1923 | 71.7 | 97 | 87.6 | 62 | 55.9 | 115 | 0.04 | 28 | 0 |
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| 1922 | 72.4 | 85 | 86.8 | 75 | 58 | 85 | 0.04 | 28 | 0 |
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| 1921 | 73.8 | 57 | 87.8 | 53 | 59.8 | 69 | trace | 41 | 0 |
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| 1920 | 73.3 | 64 | 89.5 | 24 | 57 | 104 | trace | 41 | 0 |
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| 1919 | 73.6 | 59 | 87.8 | 53 | 59.4 | 71 | trace | 41 | 0 |
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| 1918 | 74 | 51 | 89.5 | 24 | 58.4 | 78 | 0.08 | 20 | 0 |
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| 1917 | 75.1 | 32 | 89.4 | 28 | 60.7 | 58 | | | 0 |
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| 1916 | 70.3 | 106 | 83.1 | 109 | 57.5 | 94 | 0.30 | 8 | 0 |
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| 1915 | 72.3 | 86 | 85.4 | 89 | 59.1 | 72 | | | 0 |
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| 1914 | 70.2 | 107 | 83 | 110 | 57.3 | 98 | 0.00 | 66 | 0 |
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| 1913 | 71.6 | 99 | 85.2 | 92 | 57.9 | 87 | 0.20 | 10 | 0 |
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| 1912 | 71.8 | 95 | 85.3 | 91 | 58.4 | 78 | 0.00 | 66 | 0 |
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| 1911 | | | | | | | 0.06 | 24 | 21 |
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| 1910 | 73.1 | 70 | 88.5 | 43 | 57.9 | 87 | 0.34 | 7 | 1 |
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| 1909 | 70.8 | 103 | 86.7 | 77 | 54.9 | 119 | 0.00 | 66 | 0 |
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| 1908 | 73.9 | 54 | 90.7 | 12 | 57.1 | 100 | 0.16 | 12 | 0 |
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| 1907 | 74.5 | 41 | 91 | 7 | 58.1 | 82 | 0.00 | 66 | 0 |
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| 1906 | 76.4 | 16 | 92 | 4 | 60.8 | 57 | trace | 41 | 0 |
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| 1905 | 72 | 92 | 87.4 | 66 | 56.7 | 109 | 0.03 | 32 | 0 |
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| 1904 | | | 86.3 | 80 | 56.9 | 106 | 0.00 | 66 | 4 |
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| 1903 | 71.4 | 100 | 87.7 | 60 | 55.1 | 117 | 0.00 | 66 | 1 |
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| 1902 | 69.5 | 110 | 83.8 | 104 | 55.1 | 117 | 0.75 | 2 | 0 |
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| 1900 | 73 | 74 | 87.8 | 53 | 58.1 | 82 | | | 0 |
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| 1899 | 71.4 | 100 | 88.4 | 44 | 54.5 | 121 | 0.00 | 66 | 0 |
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