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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 28.09" | 29.38" | 35.19" | 33.17" | 30.22" | 26.31" | 32.42" | 35.93" | 32.04" | 27.74" | 30.38" | 30.02" | 35.39" | 26.11" | 27.33" | 25.18" | 31.86" | 29.49" | 26.92" | 28.47" | 32.03" | 28.91" | 31.33" | 29.05" | 31.05" | 32.38" | 27.60" | 30.12" | 28.46" | 26.79" | 31.65" | 32.73" | 36.03" | 30.89" | 26.54" | 21.55" | 29.99" | 30.32" | 29.21" | 31.59" | 32.04" | 31.49" | 32.50" | 35.14" | 25.87" | 27.71" | 27.12" | 32.72" | 27.56" | 30.82" | 34.60" | 29.55" | 28.15" | 31.69" | 27.92" | 33.86" | 33.80" | 29.56" | 26.12" | 32.93" | 32.09" | 28.41" | 30.29" | 30.93" | 35.91" | 28.63" | 28.75" | 29.01" | 27.39" | 24.24" | 26.46" | 25.81" | 29.55" | 29.08" | 33.12" | 32.44" | 30.96" | 38.57" | 33.51" | 31.45" | 38.79" | 31.47" | 40.88" | 32.79" | 28.21" | 28.46" | 33.57" | 28.44" | 33.91" | 27.30" | 32.92" | 32.55" | 30.93" | 27.31" | 34.45" | 35.26" | 28.25" | 32.56" | 32.49" | 31.01" | 33.55" | 38.66" | 32.17" | 30.50" | 31.45" | 29.12" | 24.88" | 32.02" | 38.57" | 36.86" | 38.48" | 40.14" | 35.34" | 36.20" | 37.54" | 34.79" | 38.68" | 33.37" |
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