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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 21.48" | 27.04" | 17.87" | 27.71" | 26.80" | 29.42" | 24.36" | 31.36" | 18.38" | 25.56" | 26.43" | 20.28" | 29.81" | 24.83" | 18.99" | 17.77" | 34.25" | 25.95" | 18.63" | 27.30" | 19.45" | 24.50" | 19.61" | 29.83" | 29.06" | 25.65" | 29.95" | 27.71" | 27.13" | 21.76" | 26.12" | 20.15" | 28.57" | 29.58" | 23.27" | 24.07" | 25.39" | 29.43" | 22.80" | 23.44" | 31.02" | 30.09" | 21.15" | 26.51" | 21.83" | 20.30" | 26.88" | 25.69" | 30.09" | 22.14" | 31.27" | 26.67" | 34.09" | 32.09" | 20.21" | 20.15" | 29.71" | 27.53" | 24.96" | 23.87" | 21.63" | 24.92" | 31.90" | 28.51" | 27.27" | 27.12" | 28.36" | 26.08" | 33.67" | 25.31" | 26.90" | 20.98" | 23.18" | 26.51" | 26.71" | 26.95" | 27.64" | 37.04" | 28.56" | 32.86" | 25.63" | 25.02" | 30.89" | 34.18" | 31.53" | 19.05" | 29.15" | 35.20" | 36.18" | 19.65" | 21.19" | 31.84" | 23.83" | 24.57" | 29.68" | 32.69" | 24.40" | 32.38" | 27.28" | 25.49" | 28.46" | 27.35" | 38.42" | 22.44" | 20.25" | 23.83" | 20.24" | 35.33" | 21.50" | 27.56" | 21.61" | 20.73" | 24.26" | 29.11" | 33.40" | 21.72" | 23.04" |
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