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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 16.76" | 17.08" | 17.59" | 13.17" | 18.10" | 12.39" | 12.01" | 13.55" | 14.11" | 19.86" | 15.75" | 17.98" | 14.19" | 18.82" | 18.44" | 15.26" | 19.47" | 15.96" | 20.35" | 19.61" | 17.12" | 19.36" | 13.25" | 16.89" | 18.56" | 16.52" | 18.95" | 15.09" | 20.73" | 11.04" | 20.15" | 14.89" | 20.49" | 16.30" | 17.73" | 15.79" | 12.94" | 14.02" | 12.87" | 13.41" | 12.93" | 15.01" | 16.79" | 15.44" | 12.04" | 17.52" | 21.78" | 16.37" | 16.93" | 13.67" | 15.49" | 17.45" | 17.74" | 15.30" | 14.34" | 13.36" | 17.36" | 12.41" | 12.05" | 13.63" | 12.63" | 16.58" | 17.44" | 13.87" | 15.70" | 13.18" | 16.87" | 10.91" | 15.17" | 13.77" | 17.27" | 14.56" | 15.95" | 14.60" | 17.43" | 16.38" | 12.67" | 18.44" | 13.69" | 14.32" | 12.84" | 12.35" | 15.66" | 15.79" | 18.39" | 11.80" | 15.75" | 18.88" | 16.91" | 18.84" | 16.02" | 18.94" | 15.08" | 13.15" | 15.18" | 15.64" | 16.89" | 18.24" | 14.94" | 18.49" | 15.20" | 17.22" | 18.89" | 18.95" | 15.86" | 15.01" | 10.58" | 13.95" | 13.61" | 17.86" | 13.69" | 19.17" | 15.53" | 15.61" | 16.86" | 15.47" | 12.95" |
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