Choose from the options below and click "Plot" to create a time series graph.
Data are available from January 1895 through April 2013.
Move mouse towards an axis until highlighted. Left-click mouse to pan. Shift key + left-click to zoom.
| 1896 | 1897 | 1898 | 1899 | 1900 | 1901 | 1902 | 1903 | 1904 | 1905 | 1906 | 1907 | 1908 | 1909 | 1910 | 1911 | 1912 | 1913 | 1914 | 1915 | 1916 | 1917 | 1918 | 1919 | 1920 | 1921 | 1922 | 1923 | 1924 | 1925 | 1926 | 1927 | 1928 | 1929 | 1930 | 1931 | 1932 | 1933 | 1934 | 1935 | 1936 | 1937 | 1938 | 1939 | 1940 | 1941 | 1942 | 1943 | 1944 | 1945 | 1946 | 1947 | 1948 | 1949 | 1950 | 1951 | 1952 | 1953 | 1954 | 1955 | 1956 | 1957 | 1958 | 1959 | 1960 | 1961 | 1962 | 1963 | 1964 | 1965 | 1966 | 1967 | 1968 | 1969 | 1970 | 1971 | 1972 | 1973 | 1974 | 1975 | 1976 | 1977 | 1978 | 1979 | 1980 | 1981 | 1982 | 1983 | 1984 | 1985 | 1986 | 1987 | 1988 | 1989 | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 28.21" | 31.88" | 26.16" | 44.28" | 31.38" | 29.87" | 36.44" | 35.76" | 27.17" | 29.51" | 34.82" | 33.58" | 35.62" | 31.57" | 27.30" | 27.42" | 36.43" | 31.66" | 29.85" | 36.20" | 31.56" | 34.33" | 28.68" | 36.30" | 32.94" | 34.45" | 30.80" | 30.85" | 30.52" | 36.18" | 30.33" | 31.20" | 28.83" | 38.44" | 35.48" | 27.37" | 29.60" | 37.32" | 27.33" | 30.83" | 39.87" | 37.57" | 30.98" | 32.64" | 31.54" | 29.96" | 33.04" | 31.57" | 29.32" | 32.48" | 40.85" | 31.72" | 39.06" | 41.18" | 31.10" | 30.55" | 32.72" | 32.51" | 33.21" | 25.83" | 30.06" | 30.90" | 36.97" | 29.91" | 40.06" | 34.67" | 32.31" | 31.83" | 33.56" | 39.84" | 33.50" | 31.72" | 32.54" | 30.15" | 34.78" | 33.33" | 38.51" | 34.25" | 32.82" | 35.27" | 35.17" | 31.87" | 36.49" | 32.84" | 35.22" | 24.92" | 33.81" | 36.10" | 34.70" | 29.43" | 35.36" | 38.55" | 28.81" | 31.18" | 38.90" | 32.64" | 31.82" | 39.46" | 31.41" | 39.80" | 36.97" | 36.92" | 42.89" | 31.45" | 30.40" | 27.64" | 27.59" | 38.21" | 35.86" | 38.09" | 34.18" | 32.47" | 29.51" | 32.16" | 41.93" | 27.12" | 30.45" | 35.13" |
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