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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 23.18" | 21.22" | 11.91" | 14.92" | 21.53" | 24.60" | 20.13" | 21.79" | 24.77" | 26.43" | 29.90" | 34.16" | 20.16" | 34.04" | 25.45" | 30.86" | 18.62" | 19.46" | 36.76" | 32.61" | 32.56" | 22.52" | 16.84" | 21.66" | 17.12" | 29.79" | 25.77" | 22.30" | 11.00" | 22.80" | 20.70" | 28.16" | 20.59" | 15.10" | 20.14" | 13.75" | 22.81" | 15.23" | 14.13" | 24.23" | 21.29" | 23.20" | 32.21" | 15.24" | 26.17" | 33.13" | 25.76" | 24.73" | 18.63" | 21.41" | 21.03" | 16.09" | 19.02" | 16.90" | 17.24" | 23.15" | 29.71" | 21.44" | 19.76" | 16.74" | 27.03" | 17.91" | 31.51" | 15.11" | 17.23" | 15.34" | 20.36" | 23.47" | 16.02" | 24.10" | 18.85" | 27.07" | 17.32" | 31.62" | 18.73" | 21.77" | 14.95" | 25.12" | 26.40" | 20.85" | 12.25" | 11.93" | 32.60" | 20.45" | 28.04" | 15.90" | 30.51" | 39.44" | 23.08" | 18.04" | 28.07" | 14.50" | 16.80" | 17.47" | 15.68" | 16.55" | 18.32" | 30.81" | 15.20" | 34.38" | 24.10" | 23.96" | 36.98" | 20.40" | 20.59" | 15.68" | 17.59" | 22.73" | 18.55" | 28.09" | 29.00" | 12.60" | 16.66" | 16.03" | 22.52" | 26.22" | 15.81" |
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