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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 20.06" | 27.43" | 21.33" | 22.99" | 23.08" | 24.55" | 15.78" | 32.50" | 28.60" | 22.35" | 25.85" | 21.89" | 25.26" | 28.25" | 26.49" | 14.84" | 18.81" | 19.89" | 21.27" | 19.17" | 29.47" | 20.24" | 22.50" | 23.75" | 24.29" | 22.85" | 21.63" | 22.16" | 21.03" | 24.90" | 18.17" | 18.56" | 19.50" | 24.41" | 21.61" | 18.87" | 17.39" | 25.45" | 17.86" | 14.84" | 23.06" | 14.99" | 22.45" | 26.04" | 21.33" | 23.69" | 19.18" | 23.58" | 25.67" | 30.83" | 26.66" | 24.23" | 25.65" | 20.00" | 21.31" | 24.41" | 34.25" | 24.93" | 21.85" | 27.00" | 17.48" | 18.61" | 22.45" | 19.79" | 27.06" | 26.75" | 22.53" | 25.36" | 21.70" | 24.45" | 26.23" | 20.69" | 22.87" | 21.29" | 27.29" | 20.59" | 18.35" | 24.51" | 29.09" | 25.18" | 23.76" | 20.21" | 25.18" | 23.89" | 26.86" | 22.70" | 23.98" | 28.77" | 23.28" | 25.76" | 19.42" | 27.61" | 25.38" | 13.95" | 17.36" | 32.69" | 26.38" | 22.95" | 41.25" | 21.05" | 25.38" | 24.81" | 21.15" | 31.25" | 28.45" | 22.36" | 26.03" | 23.98" | 20.13" | 28.07" | 23.25" | 22.75" | 32.35" | 31.98" | 27.56" | 35.35" | 25.52" | 18.37" |
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