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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 18.80" | 11.76" | 14.04" | 16.25" | 16.59" | 26.15" | 13.04" | 17.98" | 16.75" | 19.32" | 21.63" | 18.71" | 15.95" | 20.82" | 12.70" | 11.92" | 14.13" | 13.12" | 16.16" | 21.24" | 20.31" | 15.62" | 10.88" | 12.80" | 24.85" | 18.86" | 18.20" | 18.19" | 16.44" | 13.15" | 13.63" | 17.37" | 15.16" | 16.10" | 16.55" | 12.77" | 12.31" | 19.57" | 14.34" | 10.68" | 23.29" | 21.06" | 12.14" | 14.77" | 12.60" | 17.13" | 25.45" | 21.43" | 13.80" | 17.88" | 16.36" | 17.83" | 13.25" | 12.59" | 18.58" | 19.65" | 13.66" | 13.04" | 13.50" | 11.45" | 15.83" | 7.91" | 21.68" | 18.62" | 18.49" | 16.18" | 16.92" | 16.05" | 12.82" | 14.63" | 15.18" | 19.92" | 17.57" | 19.69" | 15.94" | 14.60" | 18.59" | 17.98" | 21.11" | 19.88" | 18.77" | 20.59" | 13.60" | 15.99" | 19.96" | 15.94" | 20.47" | 15.61" | 13.28" | 10.74" | 15.90" | 19.61" | 18.81" | 14.41" | 16.57" | 17.89" | 21.57" | 18.22" | 15.17" | 14.95" | 18.49" | 17.49" | 19.15" | 10.95" | 14.61" | 12.63" | 14.29" | 15.93" | 15.26" | 21.11" | 12.69" | 13.89" | 24.67" | 16.36" | 16.63" | 19.00" | 6.02" | 14.54" |
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