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.
| 1895 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 17.68" | 22.12" | 20.68" | 20.15" | 17.31" | 26.07" | 22.42" | 16.98" | 22.21" | 17.86" | 26.86" | 20.12" | 23.61" | 22.65" | 24.96" | 25.42" | 24.94" | 30.30" | 15.42" | 19.77" | 21.76" | 24.45" | 24.80" | 21.25" | 21.56" | 31.11" | 21.18" | 25.74" | 28.53" | 20.99" | 13.22" | 22.32" | 27.14" | 30.84" | 26.89" | 14.69" | 15.32" | 19.49" | 23.65" | 18.06" | 20.39" | 15.70" | 22.56" | 24.85" | 21.83" | 18.80" | 19.58" | 18.56" | 16.80" | 18.59" | 20.80" | 17.91" | 20.75" | 14.49" | 24.93" | 23.67" | 17.42" | 14.50" | 20.80" | 15.47" | 20.50" | 18.72" | 20.82" | 23.15" | 22.45" | 17.67" | 21.23" | 19.37" | 22.15" | 25.03" | 20.65" | 21.29" | 28.98" | 18.63" | 20.96" | 24.62" | 22.29" | 21.42" | 26.44" | 26.17" | 18.28" | 19.85" | 20.56" | 22.01" | 30.65" | 19.77" | 23.72" | 22.23" | 28.80" | 28.30" | 21.00" | 17.02" | 14.93" | 14.04" | 27.77" | 16.66" | 24.67" | 21.00" | 19.47" | 26.10" | 24.59" | 23.96" | 22.75" | 32.54" | 18.04" | 21.40" | 21.34" | 18.69" | 29.55" | 26.83" | 23.87" | 20.49" | 12.75" | 21.54" | 26.73" | 29.11" | 24.97" | 17.32" |
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