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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 22.40" | 29.95" | 28.08" | 29.14" | 29.65" | 24.87" | 31.28" | 31.13" | 32.18" | 29.73" | 28.87" | 28.68" | 30.27" | 29.61" | 26.62" | 27.92" | 30.31" | 31.59" | 28.14" | 25.64" | 30.81" | 29.29" | 28.68" | 28.38" | 29.66" | 28.11" | 27.40" | 24.79" | 25.37" | 34.33" | 24.16" | 27.78" | 27.47" | 32.06" | 28.41" | 21.20" | 30.38" | 26.70" | 37.31" | 30.37" | 30.16" | 31.75" | 36.04" | 31.84" | 29.84" | 34.58" | 25.80" | 34.46" | 28.52" | 30.64" | 38.21" | 32.69" | 34.16" | 33.74" | 30.50" | 35.16" | 32.31" | 36.25" | 32.79" | 29.24" | 30.78" | 38.17" | 25.99" | 35.84" | 29.42" | 33.75" | 31.99" | 28.32" | 23.83" | 29.10" | 26.53" | 26.28" | 31.64" | 27.23" | 26.50" | 30.65" | 31.04" | 38.29" | 34.40" | 34.81" | 40.23" | 31.28" | 33.31" | 33.35" | 38.05" | 29.32" | 31.66" | 31.13" | 31.99" | 35.74" | 29.18" | 31.40" | 32.85" | 27.62" | 36.15" | 34.86" | 24.72" | 31.34" | 34.58" | 39.06" | 24.48" | 42.37" | 28.90" | 34.21" | 33.25" | 33.39" | 27.32" | 31.28" | 41.03" | 44.16" | 30.04" | 36.35" | 31.74" | 35.31" | 32.04" | 30.60" | 47.29" | 31.07" |
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