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.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 27.14" | 29.99" | 24.04" | 22.29" | 23.43" | 21.34" | 20.81" | 21.62" | 27.57" | 31.60" | 29.65" | 28.00" | 23.93" | 20.16" | 23.53" | 28.53" | 25.55" | 28.21" | 35.45" | 31.61" | 23.93" | 20.88" | 29.62" | 33.48" | 30.07" | 25.23" | 21.82" | 26.70" | 25.83" | 26.86" | 28.93" | 24.86" | 26.87" | 28.45" | 29.91" | 34.19" | 29.13" | 22.21" | 23.31" | 26.65" | 26.05" | 26.53" | 25.38" | 25.25" | 39.51" | 41.95" | 27.50" | 24.84" | 23.73" | 22.49" | 22.64" | 22.92" | 28.00" | 26.96" | 19.25" | 19.92" | 20.40" | 19.66" | 22.71" | 18.77" | 19.47" | 30.64" | 30.10" | 25.36" | 28.09" | 27.30" | 25.17" | 22.48" | 23.55" | 27.05" | 25.19" | 24.02" | 26.68" | 26.91" | 23.53" | 26.20" | 31.31" | 27.04" | 26.79" | 26.72" | 23.40" | 25.23" | 30.23" | 29.92" | 26.47" | 27.52" | 26.60" | 28.89" | 34.50" | 36.89" | 36.51" | 35.75" | 28.31" | 24.92" | 30.81" | 34.42" | 32.36" | 27.25" | 27.46" | 27.40" | 29.48" | 29.87" | 31.14" | 27.33" | 24.02" | 25.43" | 20.48" | 25.83" | 32.81" | 31.60" | 30.14" | 28.62" | 25.02" | 27.90" | 23.60" | 17.88" |
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