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 | 2013 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 17.15" | 21.07" | 15.89" | 27.97" | 20.54" | 22.03" | 21.64" | 28.19" | 17.44" | 18.17" | 21.91" | 18.28" | 25.87" | 18.76" | 16.19" | 15.94" | 25.37" | 22.53" | 20.48" | 26.22" | 20.81" | 18.74" | 17.46" | 27.14" | 19.59" | 21.43" | 20.68" | 19.89" | 19.46" | 26.71" | 23.18" | 19.16" | 18.41" | 24.28" | 26.54" | 20.56" | 17.98" | 27.52" | 15.40" | 19.47" | 26.69" | 26.24" | 18.12" | 21.64" | 16.87" | 15.89" | 20.20" | 19.85" | 18.63" | 21.09" | 27.24" | 19.83" | 28.86" | 28.89" | 16.35" | 18.23" | 23.60" | 21.61" | 23.18" | 18.02" | 18.05" | 21.24" | 28.44" | 18.69" | 28.25" | 22.65" | 20.77" | 22.61" | 25.18" | 25.63" | 22.36" | 21.54" | 18.35" | 20.06" | 21.84" | 21.36" | 25.23" | 25.53" | 22.76" | 23.28" | 22.69" | 23.58" | 26.70" | 22.03" | 24.51" | 17.80" | 22.61" | 25.43" | 28.27" | 17.11" | 21.57" | 27.35" | 20.73" | 20.36" | 27.37" | 23.18" | 18.99" | 27.20" | 23.87" | 25.97" | 25.74" | 25.57" | 33.53" | 21.85" | 21.64" | 18.53" | 16.94" | 28.06" | 21.72" | 25.72" | 20.96" | 23.14" | 20.82" | 18.68" | 31.75" | 17.12" | 20.57" | 22.82" |
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