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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 17.72" | 22.79" | 15.49" | 16.48" | 17.73" | 19.25" | 19.48" | 20.01" | 19.12" | 17.91" | 19.44" | 20.76" | 13.36" | 18.93" | 18.18" | 13.10" | 18.09" | 20.65" | 14.84" | 18.95" | 20.54" | 19.34" | 10.61" | 15.82" | 16.50" | 14.71" | 19.88" | 20.09" | 17.67" | 17.32" | 16.95" | 15.54" | 21.49" | 18.45" | 14.14" | 14.95" | 15.95" | 17.38" | 12.91" | 9.97" | 18.30" | 8.74" | 17.43" | 15.16" | 13.92" | 17.80" | 22.84" | 19.45" | 18.04" | 21.60" | 14.73" | 17.32" | 18.42" | 18.30" | 16.58" | 17.86" | 16.95" | 12.08" | 20.29" | 18.31" | 17.39" | 17.08" | 18.65" | 13.63" | 16.16" | 14.43" | 13.59" | 20.43" | 17.52" | 19.42" | 20.58" | 17.39" | 13.75" | 19.66" | 15.94" | 19.13" | 19.31" | 16.92" | 16.60" | 15.86" | 21.08" | 11.96" | 21.07" | 17.72" | 14.81" | 16.35" | 17.53" | 20.75" | 15.83" | 15.60" | 17.78" | 21.54" | 16.80" | 11.81" | 13.42" | 15.03" | 19.77" | 14.71" | 23.10" | 20.57" | 19.80" | 18.27" | 16.21" | 22.31" | 19.76" | 21.96" | 17.10" | 16.37" | 17.01" | 18.76" | 20.98" | 14.06" | 19.24" | 20.62" | 19.65" | 24.32" | 20.53" | 14.54" |
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