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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 20.74" | 19.42" | 13.30" | 18.35" | 12.19" | 25.54" | 20.72" | 14.80" | 22.95" | 17.76" | 20.13" | 16.31" | 16.51" | 19.02" | 13.61" | 15.33" | 21.29" | 15.62" | 20.39" | 18.44" | 19.85" | 13.71" | 13.33" | 16.54" | 15.77" | 17.63" | 20.09" | 18.84" | 16.62" | 18.50" | 13.33" | 21.98" | 19.65" | 14.16" | 15.33" | 14.30" | 18.34" | 15.32" | 9.64" | 17.77" | 9.28" | 16.57" | 16.14" | 13.95" | 15.71" | 19.51" | 22.26" | 19.87" | 17.54" | 18.02" | 15.01" | 18.98" | 19.50" | 16.47" | 17.88" | 14.61" | 16.64" | 18.91" | 16.69" | 18.66" | 16.65" | 17.08" | 17.05" | 12.47" | 16.91" | 13.13" | 20.95" | 18.57" | 17.78" | 19.45" | 18.45" | 14.69" | 15.93" | 20.43" | 17.89" | 16.91" | 18.84" | 14.47" | 18.92" | 19.83" | 15.33" | 13.90" | 21.65" | 17.06" | 10.67" | 19.65" | 19.15" | 18.68" | 15.98" | 15.13" | 22.82" | 19.60" | 10.90" | 13.65" | 16.29" | 16.65" | 16.31" | 22.98" | 16.41" | 22.38" | 17.56" | 18.79" | 17.03" | 23.76" | 19.69" | 21.99" | 14.24" | 17.54" | 16.70" | 21.86" | 14.29" | 20.99" | 14.47" | 22.08" | 22.21" | 25.43" | 15.33" |
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