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.
| 1895 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 29.63" | 25.12" | 26.20" | 26.45" | 22.61" | 39.37" | 23.02" | 19.22" | 30.25" | 19.12" | 41.15" | 21.14" | 30.57" | 28.16" | 27.80" | 23.86" | 22.47" | 34.85" | 29.16" | 23.78" | 25.36" | 25.21" | 21.08" | 21.46" | 36.75" | 27.52" | 25.53" | 37.41" | 36.66" | 26.90" | 19.73" | 35.71" | 33.73" | 30.65" | 31.55" | 22.88" | 20.81" | 30.62" | 29.22" | 30.95" | 32.71" | 20.51" | 27.74" | 26.59" | 27.48" | 33.88" | 29.71" | 31.37" | 23.29" | 32.69" | 30.86" | 43.48" | 34.54" | 25.36" | 32.92" | 38.07" | 24.69" | 27.27" | 39.79" | 19.79" | 29.85" | 27.30" | 34.21" | 30.40" | 29.77" | 21.32" | 36.53" | 23.99" | 17.88" | 27.95" | 21.79" | 34.80" | 24.38" | 28.65" | 26.72" | 22.02" | 20.52" | 27.30" | 36.42" | 34.81" | 38.44" | 24.14" | 25.10" | 26.00" | 39.51" | 38.53" | 23.85" | 26.18" | 40.05" | 27.91" | 24.08" | 22.23" | 31.81" | 26.64" | 39.12" | 36.39" | 51.87" | 34.96" | 36.04" | 30.04" | 35.79" | 22.63" | 38.82" | 30.39" | 30.02" | 23.32" | 34.82" | 23.93" | 26.34" | 42.85" | 23.64" | 21.89" | 25.23" | 26.69" | 22.84" | 21.33" | 17.85" | 31.25" |
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