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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 23.63" | 34.63" | 27.22" | 27.18" | 29.45" | 31.36" | 25.23" | 33.66" | 33.69" | 28.39" | 34.60" | 31.12" | 28.23" | 31.03" | 31.22" | 20.46" | 30.81" | 28.28" | 28.75" | 31.69" | 31.96" | 29.21" | 25.72" | 28.49" | 30.43" | 28.15" | 30.39" | 26.82" | 25.46" | 28.61" | 26.43" | 29.92" | 28.83" | 32.05" | 26.26" | 22.47" | 30.43" | 26.65" | 24.22" | 26.36" | 29.45" | 24.00" | 27.36" | 33.74" | 24.02" | 29.90" | 31.82" | 33.09" | 29.42" | 31.42" | 32.60" | 29.20" | 30.50" | 26.26" | 28.94" | 29.06" | 36.19" | 27.57" | 28.62" | 31.55" | 25.09" | 25.89" | 29.99" | 24.49" | 34.04" | 29.18" | 31.26" | 27.01" | 24.73" | 29.98" | 35.54" | 27.27" | 26.80" | 36.05" | 27.42" | 33.48" | 28.27" | 33.27" | 34.38" | 29.60" | 30.65" | 20.74" | 34.79" | 32.09" | 30.94" | 28.36" | 30.93" | 34.50" | 33.42" | 33.06" | 34.00" | 34.11" | 28.87" | 25.07" | 24.97" | 33.15" | 36.38" | 31.09" | 36.63" | 29.53" | 33.07" | 32.26" | 28.03" | 32.50" | 31.25" | 31.98" | 32.29" | 30.50" | 28.39" | 34.78" | 29.96" | 30.11" | 34.48" | 34.07" | 31.92" | 37.38" | 30.02" | 28.84" |
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