Choose from the options below and click "Plot" to create a time series graph.
Data are available from January 1895 through May 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 22.13" | 20.92" | 12.04" | 14.78" | 21.27" | 25.33" | 19.19" | 21.77" | 27.45" | 23.79" | 31.02" | 33.92" | 19.81" | 34.17" | 25.33" | 30.57" | 20.18" | 18.96" | 36.36" | 31.66" | 33.70" | 21.44" | 19.07" | 20.22" | 17.17" | 29.39" | 25.64" | 23.54" | 9.39" | 24.02" | 19.65" | 28.45" | 20.09" | 16.44" | 19.29" | 14.51" | 21.82" | 15.30" | 14.82" | 23.63" | 22.00" | 22.71" | 32.30" | 16.62" | 24.41" | 33.53" | 25.24" | 24.91" | 18.64" | 21.89" | 20.65" | 16.48" | 18.86" | 16.20" | 17.79" | 22.96" | 30.37" | 21.02" | 20.07" | 16.32" | 26.88" | 18.46" | 32.03" | 15.29" | 15.72" | 16.02" | 19.98" | 24.44" | 15.33" | 24.55" | 18.05" | 28.19" | 16.95" | 31.23" | 18.63" | 22.15" | 15.11" | 24.46" | 26.81" | 20.67" | 14.62" | 10.80" | 32.25" | 19.64" | 27.74" | 15.82" | 32.34" | 39.79" | 22.08" | 17.74" | 28.56" | 12.97" | 17.31" | 18.47" | 14.78" | 16.47" | 18.59" | 30.69" | 14.49" | 35.13" | 23.50" | 25.41" | 36.55" | 19.66" | 20.55" | 15.55" | 17.08" | 23.49" | 18.00" | 29.00" | 28.04" | 13.14" | 16.06" | 16.44" | 22.28" | 27.37" | 15.09" |
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