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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 16.27" | 16.08" | 23.25" | 19.54" | 15.21" | 12.74" | 10.92" | 19.89" | 18.69" | 11.05" | 16.35" | 22.17" | 19.11" | 15.94" | 16.33" | 16.51" | 20.28" | 23.04" | 16.42" | 15.50" | 19.78" | 15.95" | 14.49" | 15.02" | 18.78" | 17.26" | 19.49" | 14.98" | 19.32" | 11.58" | 17.07" | 19.40" | 18.97" | 17.10" | 21.33" | 9.27" | 18.38" | 19.52" | 11.23" | 11.89" | 15.15" | 22.24" | 17.35" | 16.25" | 12.93" | 11.88" | 15.99" | 17.36" | 12.22" | 18.03" | 15.61" | 15.32" | 15.65" | 20.62" | 21.37" | 21.37" | 21.89" | 13.18" | 11.67" | 19.34" | 18.46" | 11.87" | 13.97" | 16.00" | 17.14" | 14.05" | 16.57" | 15.97" | 14.47" | 16.10" | 14.23" | 16.67" | 15.48" | 14.47" | 13.12" | 15.72" | 14.14" | 17.92" | 18.93" | 18.77" | 16.99" | 11.04" | 17.03" | 18.48" | 15.58" | 11.37" | 17.27" | 13.99" | 20.51" | 17.85" | 21.02" | 14.96" | 13.79" | 18.53" | 15.45" | 22.03" | 14.00" | 17.21" | 18.01" | 13.55" | 18.35" | 19.11" | 15.36" | 15.73" | 15.75" | 11.78" | 18.11" | 15.74" | 17.73" | 21.30" | 15.82" | 22.08" | 25.08" | 16.29" | 15.35" | 18.41" | 21.74" | 17.27" |
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