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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 16.48" | 20.80" | 12.04" | 22.66" | 18.74" | 19.06" | 19.88" | 24.51" | 13.97" | 16.88" | 20.73" | 10.89" | 21.86" | 16.11" | 12.53" | 11.38" | 24.32" | 20.46" | 14.48" | 20.39" | 13.57" | 18.92" | 10.84" | 21.82" | 19.39" | 17.88" | 20.85" | 17.30" | 18.02" | 17.00" | 21.38" | 15.71" | 17.63" | 20.27" | 17.80" | 16.53" | 18.83" | 21.01" | 14.17" | 15.70" | 23.95" | 21.00" | 12.17" | 19.01" | 15.66" | 16.34" | 21.24" | 18.47" | 21.89" | 14.38" | 21.91" | 17.83" | 26.06" | 23.42" | 13.44" | 14.34" | 22.49" | 19.25" | 18.51" | 15.48" | 14.79" | 15.24" | 22.51" | 19.22" | 20.21" | 18.18" | 21.93" | 19.62" | 24.87" | 20.62" | 18.25" | 14.97" | 15.76" | 18.45" | 20.20" | 19.33" | 20.14" | 26.23" | 20.14" | 23.21" | 16.65" | 19.72" | 21.64" | 22.72" | 22.13" | 13.46" | 20.21" | 25.70" | 25.97" | 13.98" | 17.20" | 26.24" | 17.62" | 16.19" | 22.47" | 21.88" | 18.53" | 26.22" | 21.69" | 19.28" | 21.44" | 18.85" | 30.37" | 16.61" | 14.86" | 18.63" | 14.63" | 23.43" | 15.38" | 19.17" | 15.79" | 16.40" | 16.95" | 17.68" | 26.38" | 16.04" | 15.74" | 18.88" |
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