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.
| 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 | 2013 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 16.36" | 18.39" | 14.81" | 16.20" | 16.76" | 15.49" | 17.22" | 17.38" | 18.49" | 14.88" | 19.83" | 19.71" | 16.49" | 20.23" | 19.30" | 14.47" | 18.13" | 17.84" | 16.66" | 17.06" | 22.73" | 18.18" | 14.28" | 16.18" | 15.81" | 15.83" | 16.67" | 16.21" | 20.19" | 15.63" | 15.00" | 18.28" | 18.41" | 17.79" | 15.11" | 15.02" | 15.20" | 16.15" | 13.35" | 13.22" | 14.68" | 11.52" | 15.82" | 15.99" | 15.38" | 14.86" | 20.05" | 18.49" | 16.19" | 19.27" | 15.90" | 19.36" | 17.84" | 17.19" | 16.38" | 16.66" | 18.53" | 14.85" | 15.99" | 15.10" | 15.00" | 14.92" | 18.95" | 14.67" | 16.31" | 13.71" | 15.17" | 20.19" | 16.80" | 16.71" | 19.20" | 15.90" | 16.10" | 18.29" | 16.73" | 17.14" | 17.09" | 18.18" | 17.10" | 15.28" | 17.66" | 13.65" | 19.55" | 18.63" | 14.06" | 14.77" | 18.21" | 20.58" | 18.76" | 15.11" | 18.42" | 18.83" | 15.63" | 14.01" | 15.04" | 15.93" | 17.51" | 17.66" | 21.63" | 17.43" | 19.37" | 18.89" | 17.82" | 20.55" | 17.10" | 16.14" | 14.84" | 15.22" | 14.40" | 17.27" | 19.34" | 15.67" | 17.13" | 20.81" | 17.86" | 21.55" | 19.03" | 12.12" |
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