Choose from the options below and click "Plot" to create a time series graph.
Data are available from January 1895 through May 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 27.26" | 18.08" | 19.86" | 20.28" | 16.13" | 34.99" | 20.75" | 18.26" | 21.94" | 20.91" | 35.97" | 22.87" | 28.95" | 28.83" | 24.59" | 23.59" | 26.71" | 32.94" | 25.85" | 24.48" | 17.98" | 24.53" | 16.08" | 17.83" | 30.58" | 25.30" | 26.82" | 31.71" | 33.58" | 17.02" | 15.07" | 30.89" | 29.97" | 30.83" | 24.19" | 15.06" | 17.09" | 18.97" | 31.38" | 23.77" | 29.54" | 18.26" | 20.83" | 24.60" | 21.56" | 31.62" | 30.88" | 28.13" | 22.16" | 23.40" | 28.96" | 37.08" | 25.87" | 18.84" | 29.75" | 31.03" | 20.19" | 24.27" | 35.69" | 20.43" | 26.85" | 19.82" | 30.86" | 28.39" | 27.61" | 16.04" | 30.47" | 18.96" | 16.65" | 24.80" | 17.05" | 21.04" | 23.57" | 25.44" | 26.67" | 21.23" | 20.44" | 22.63" | 32.89" | 24.83" | 37.21" | 23.39" | 22.31" | 20.58" | 30.60" | 33.80" | 21.98" | 21.43" | 29.84" | 22.05" | 18.77" | 20.61" | 22.60" | 22.67" | 38.20" | 22.45" | 41.60" | 24.76" | 29.05" | 27.52" | 33.21" | 22.67" | 29.27" | 16.02" | 24.32" | 22.81" | 29.93" | 22.08" | 24.26" | 33.25" | 19.18" | 18.20" | 24.48" | 18.87" | 24.55" | 17.37" | 17.50" | 26.95" |
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