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.
| 1895 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 14.68" | 23.26" | 22.61" | 26.15" | 19.16" | 20.49" | 14.55" | 24.14" | 20.04" | 22.92" | 20.46" | 16.65" | 20.83" | 26.41" | 25.92" | 17.21" | 16.13" | 21.72" | 17.54" | 13.23" | 23.18" | 16.09" | 20.74" | 19.12" | 19.75" | 19.76" | 18.44" | 21.56" | 18.14" | 20.23" | 16.22" | 18.25" | 27.33" | 20.53" | 25.40" | 12.50" | 17.14" | 15.03" | 20.99" | 12.32" | 25.65" | 10.80" | 19.23" | 26.35" | 22.85" | 15.82" | 16.66" | 23.61" | 23.16" | 21.93" | 28.16" | 19.80" | 21.69" | 22.36" | 18.78" | 23.66" | 24.99" | 21.33" | 19.28" | 17.73" | 20.42" | 19.20" | 28.42" | 22.06" | 18.11" | 21.16" | 23.98" | 20.11" | 18.83" | 20.52" | 19.99" | 18.60" | 21.15" | 19.49" | 22.64" | 24.15" | 17.26" | 20.03" | 29.14" | 24.41" | 22.43" | 19.44" | 19.47" | 20.07" | 23.05" | 17.43" | 26.62" | 22.40" | 22.12" | 21.87" | 22.03" | 20.28" | 15.49" | 12.48" | 18.38" | 28.85" | 16.97" | 17.20" | 26.88" | 18.11" | 23.43" | 24.23" | 19.07" | 27.96" | 21.23" | 23.70" | 19.50" | 24.25" | 21.65" | 20.95" | 13.05" | 20.06" | 19.19" | 30.11" | 28.13" | 26.41" | 28.65" | 12.29" |
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