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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 15.11" | 17.28" | 12.31" | 23.45" | 17.77" | 18.25" | 15.93" | 22.66" | 13.52" | 15.53" | 18.14" | 12.79" | 19.41" | 14.57" | 12.78" | 13.15" | 22.16" | 16.04" | 14.95" | 21.80" | 16.97" | 15.66" | 11.04" | 22.52" | 17.68" | 16.46" | 17.96" | 17.13" | 16.28" | 17.70" | 20.98" | 14.73" | 16.24" | 15.45" | 18.88" | 14.79" | 15.85" | 23.19" | 11.38" | 15.21" | 20.91" | 22.22" | 14.28" | 17.31" | 13.68" | 13.43" | 17.41" | 15.01" | 14.91" | 15.37" | 19.84" | 15.09" | 23.07" | 23.24" | 12.06" | 12.86" | 18.72" | 17.63" | 16.56" | 15.43" | 13.49" | 15.51" | 20.12" | 15.70" | 22.23" | 16.11" | 18.45" | 17.46" | 20.25" | 20.82" | 18.26" | 16.36" | 15.20" | 17.28" | 16.57" | 18.72" | 21.02" | 22.41" | 18.67" | 17.85" | 15.74" | 18.93" | 21.20" | 19.81" | 15.25" | 13.20" | 19.79" | 21.73" | 23.74" | 14.49" | 18.62" | 24.42" | 15.41" | 13.85" | 21.31" | 21.02" | 16.17" | 23.08" | 19.63" | 21.34" | 21.89" | 19.23" | 28.85" | 15.05" | 14.52" | 12.01" | 11.85" | 22.10" | 16.73" | 16.04" | 18.61" | 17.97" | 17.40" | 15.36" | 26.11" | 12.52" | 15.05" | 18.58" |
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