| Year | Value | | 2014 | 7,760.9886761218 | | 2013 | 7,845.7513753201 | | 2012 | 7,867.0891284822 | | 2011 | 7,936.7255737467 | | 2010 | 8,021.6698252478 | | 2009 | 7,713.598808634 | | 2008 | 8,081.0804264686 | | 2007 | 8,122.1792199854 | | 2006 | 8,041.4231282592 | | 2005 | 8,036.9606848313 | | 2004 | 7,905.9179649714 | | 2003 | 7,802.4293745793 | | 2002 | 7,742.6814503639 | | 2001 | 7,627.526888223 | | 2000 | 7,722.0366301677 | | 1999 | 7,483.7383604153 | | 1998 | 7,365.1213289232 | | 1997 | 7,248.0542253657 | | 1996 | 7,160.7191858956 | | 1995 | 7,017.4748442368 | | 1994 | 6,869.6447445746 | | 1993 | 6,728.3265259911 | | 1992 | 6,658.3311892495 | | 1991 | 6,674.5841873039 | | 1990 | 6,516.4030677233 | | 1989 | 6,410.0558199789 | | 1988 | 6,255.2769642022 | | 1987 | 6,048.7567478041 | | 1986 | 5,813.6633638021 | | 1985 | 5,743.4651292789 | | 1984 | 5,590.5769656271 | | 1983 | 5,325.6427587093 | | 1982 | 5,182.3192428142 | | 1981 | 5,283.7959540696 | | 1980 | 5,232.3926588148 | | 1979 | 5,182.9527611694 | | 1978 | 5,038.1598399558 | | 1977 | 4,865.5151586 | | 1976 | 4,702.1844030507 | | 1975 | 4,439.4045105469 | | 1974 | 4,426.3569492712 | | 1973 | 4,411.4007079736 | | 1972 | 4,140.2686457825 | | 1971 | 3,871.5022545315 | | 1970 | 4,213.5877149824 | | 1969 | 3,888.9673796569 | | 1968 | 3,587.2884527549 | | 1967 | 3,319.0163125006 | | 1966 | 3,139.1240485103 | | 1965 | 2,943.6027118328 | | 1964 | 2,800.6114129186 | | 1963 | 2,615.1389178539 | | 1962 | 2,449.7425116324 | | 1961 | 2,298.5113759201 | | 1960 | 2,183.9136673256 |
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