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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 22.32" | 17.78" | 16.28" | 18.17" | 15.84" | 16.99" | 17.44" | 16.35" | 18.57" | 14.26" | 16.39" | 18.93" | 16.81" | 17.11" | 15.60" | 13.61" | 17.58" | 15.15" | 16.07" | 14.17" | 20.60" | 16.33" | 18.63" | 16.62" | 12.23" | 19.34" | 13.31" | 16.26" | 10.77" | 17.11" | 13.77" | 18.57" | 14.87" | 12.56" | 17.52" | 12.59" | 19.29" | 17.24" | 18.49" | 15.70" | 17.56" | 17.51" | 18.82" | 12.91" | 20.28" | 14.16" | 16.66" | 18.21" | 11.72" | 17.29" | 17.58" | 13.91" | 18.63" | 16.15" | 19.64" | 18.41" | 15.41" | 22.36" | 18.27" | 14.67" | 21.42" | 18.18" | 19.64" | 17.49" | 17.23" | 18.39" | 15.86" | 15.21" | 15.16" | 20.21" | 13.92" | 18.36" | 15.97" | 17.87" | 19.13" | 20.56" | 21.55" | 13.45" | 22.18" | 19.46" | 17.43" | 10.05" | 18.86" | 14.45" | 18.22" | 17.17" | 21.60" | 21.34" | 18.41" | 10.44" | 16.87" | 13.84" | 16.84" | 15.64" | 16.34" | 15.87" | 11.52" | 17.76" | 14.00" | 19.34" | 23.08" | 23.68" | 19.13" | 20.65" | 17.37" | 10.28" | 16.49" | 19.81" | 16.77" | 15.23" | 21.04" | 14.78" | 16.17" | 15.97" | 16.44" | 21.44" | 17.96" |
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