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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 17.60" | 14.66" | 18.56" | 15.62" | 13.79" | 14.11" | 13.64" | 13.52" | 13.24" | 16.43" | 17.30" | 19.50" | 15.42" | 17.84" | 19.79" | 14.42" | 18.09" | 18.38" | 18.19" | 18.26" | 19.62" | 17.47" | 15.26" | 16.55" | 17.21" | 17.54" | 18.90" | 14.90" | 20.68" | 13.38" | 16.94" | 16.49" | 19.25" | 17.35" | 18.24" | 15.89" | 13.13" | 13.08" | 14.18" | 10.80" | 14.90" | 15.29" | 13.90" | 18.88" | 10.52" | 15.68" | 21.66" | 18.57" | 14.33" | 15.88" | 16.05" | 16.55" | 18.10" | 15.15" | 16.43" | 12.35" | 16.47" | 12.95" | 13.90" | 11.71" | 14.12" | 11.52" | 20.22" | 14.47" | 15.80" | 12.84" | 18.11" | 12.49" | 13.00" | 13.62" | 19.56" | 12.61" | 16.24" | 14.00" | 18.58" | 15.21" | 14.55" | 15.19" | 16.80" | 12.06" | 13.68" | 12.68" | 14.20" | 15.08" | 17.33" | 13.62" | 16.83" | 16.56" | 18.67" | 18.22" | 16.79" | 17.70" | 16.71" | 14.25" | 12.73" | 17.37" | 16.26" | 16.90" | 16.18" | 14.62" | 19.39" | 16.89" | 19.16" | 16.66" | 18.06" | 14.29" | 14.33" | 9.91" | 14.57" | 17.89" | 15.62" | 16.75" | 16.83" | 14.32" | 16.70" | 15.53" | 15.19" | 10.66" |
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