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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 21.81" | 14.67" | 18.88" | 20.68" | 18.75" | 17.39" | 18.31" | 19.90" | 19.48" | 13.62" | 15.31" | 15.92" | 20.67" | 16.29" | 15.73" | 15.46" | 17.71" | 20.98" | 19.61" | 16.02" | 18.37" | 14.94" | 17.33" | 15.76" | 16.74" | 17.58" | 17.74" | 14.94" | 16.30" | 14.04" | 17.92" | 18.19" | 25.10" | 15.59" | 18.60" | 11.77" | 17.55" | 19.77" | 14.64" | 15.46" | 18.59" | 19.80" | 18.06" | 16.06" | 16.65" | 15.37" | 17.12" | 19.26" | 16.48" | 17.22" | 17.60" | 17.78" | 15.74" | 19.01" | 18.24" | 21.50" | 19.00" | 18.33" | 17.19" | 19.76" | 22.08" | 13.49" | 18.02" | 18.06" | 23.88" | 13.57" | 15.49" | 15.97" | 16.61" | 14.01" | 17.18" | 14.06" | 16.59" | 18.39" | 18.13" | 20.63" | 18.36" | 21.89" | 20.76" | 18.20" | 21.37" | 18.73" | 24.58" | 20.18" | 16.90" | 16.02" | 18.18" | 16.18" | 21.69" | 15.99" | 20.38" | 16.89" | 15.22" | 16.50" | 19.39" | 22.72" | 16.45" | 20.08" | 20.07" | 14.88" | 22.45" | 22.27" | 21.00" | 16.81" | 17.17" | 17.22" | 15.11" | 19.70" | 20.09" | 18.07" | 23.79" | 22.90" | 26.34" | 20.26" | 19.30" | 23.02" | 17.49" | 17.79" |
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