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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 29.62" | 30.35" | 27.70" | 29.26" | 28.79" | 24.50" | 25.18" | 27.51" | 28.68" | 23.87" | 24.64" | 29.64" | 26.70" | 25.47" | 28.30" | 25.12" | 29.75" | 27.29" | 28.10" | 21.61" | 30.95" | 22.36" | 27.78" | 22.97" | 25.21" | 28.12" | 23.59" | 25.00" | 19.23" | 26.03" | 22.45" | 32.41" | 25.87" | 19.09" | 23.34" | 21.15" | 27.19" | 28.81" | 26.30" | 24.76" | 23.87" | 24.96" | 30.02" | 20.89" | 28.84" | 26.18" | 25.03" | 31.64" | 18.82" | 26.59" | 30.26" | 29.15" | 29.26" | 25.33" | 32.85" | 29.93" | 23.11" | 28.82" | 29.20" | 25.46" | 34.76" | 24.91" | 27.99" | 30.64" | 24.71" | 30.02" | 26.21" | 26.66" | 26.61" | 30.17" | 22.89" | 29.52" | 27.42" | 28.72" | 27.05" | 32.20" | 31.21" | 21.90" | 32.90" | 31.04" | 27.46" | 18.14" | 29.67" | 23.55" | 26.45" | 28.71" | 34.52" | 32.48" | 32.89" | 23.95" | 26.02" | 21.33" | 22.79" | 27.18" | 26.21" | 24.91" | 22.42" | 27.84" | 20.87" | 31.75" | 34.84" | 38.53" | 27.05" | 31.69" | 27.28" | 17.92" | 23.81" | 26.19" | 28.21" | 23.17" | 29.40" | 28.20" | 23.37" | 26.87" | 28.42" | 30.19" | 27.96" |
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