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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 25.76" | 23.34" | 21.37" | 18.81" | 25.35" | 22.54" | 28.84" | 27.88" | 24.30" | 30.51" | 26.15" | 20.86" | 26.60" | 21.66" | 20.13" | 20.74" | 22.28" | 18.91" | 24.00" | 35.36" | 19.11" | 20.74" | 20.91" | 24.74" | 25.80" | 21.86" | 15.25" | 30.06" | 19.81" | 21.82" | 20.16" | 25.23" | 21.53" | 23.92" | 24.94" | 18.35" | 23.44" | 19.16" | 14.30" | 22.94" | 14.85" | 18.28" | 21.76" | 16.55" | 16.32" | 24.88" | 25.72" | 18.02" | 26.16" | 23.75" | 24.17" | 22.85" | 21.49" | 27.15" | 22.52" | 29.88" | 19.28" | 19.62" | 21.66" | 16.65" | 15.48" | 26.97" | 23.58" | 23.60" | 22.82" | 21.87" | 27.03" | 21.15" | 20.01" | 28.61" | 19.33" | 21.99" | 21.54" | 23.11" | 19.09" | 23.06" | 22.48" | 29.61" | 17.40" | 18.71" | 19.52" | 27.95" | 22.28" | 25.23" | 18.82" | 21.77" | 27.82" | 25.26" | 27.61" | 23.36" | 27.52" | 24.45" | 21.76" | 17.48" | 20.56" | 21.80" | 26.50" | 32.01" | 21.39" | 26.83" | 24.27" | 23.22" | 24.98" | 25.25" | 19.30" | 25.13" | 17.46" | 19.00" | 22.96" | 24.37" | 20.97" | 30.51" | 28.42" | 25.52" | 27.89" | 25.69" | 13.22" |
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