| Year | Value | | 2014 | 5,672.064134108 | | 2013 | 5,698.7561788791 | | 2012 | 5,651.0084828177 | | 2011 | 5,657.5381586888 | | 2010 | 5,927.8686799023 | | 2009 | 5,947.9094892925 | | 2008 | 6,340.7330454942 | | 2007 | 6,218.3134035411 | | 2006 | 6,351.0991107947 | | 2005 | 6,241.7155739277 | | 2004 | 6,168.3989875836 | | 2003 | 6,092.548994488 | | 2002 | 6,035.6866458271 | | 2001 | 5,896.9392249789 | | 2000 | 5,796.055581164 | | 1999 | 5,433.8649393068 | | 1998 | 5,201.6109048519 | | 1997 | 4,976.6328241119 | | 1996 | 4,787.8906174828 | | 1995 | 4,525.2755663106 | | 1994 | 4,351.0642031247 | | 1993 | 4,185.0972286419 | | 1992 | 4,104.9001947488 | | 1991 | 3,897.8732314065 | | 1990 | 3,767.529298737 | | 1989 | 3,598.1109703792 | | 1988 | 3,427.2836287844 | | 1987 | 3,414.6342841372 | | 1986 | 3,271.4729255952 | | 1985 | 3,114.9645485887 | | 1984 | 2,962.2726383562 | | 1983 | 2,852.7886970888 | | 1982 | 2,794.1935854036 | | 1981 | 2,827.3964668404 | | 1980 | 2,868.3192686357 | | 1979 | 2,935.0129677658 | | 1978 | 2,693.5207713796 | | 1977 | 2,535.7991591006 | | 1976 | 2,377.6655703278 | | 1975 | 2,175.2284805067 | | 1974 | 2,246.0557768924 | | 1973 | 2,143.2622045075 | | 1972 | 2,021.1732551822 | | 1971 | 1,884.6610183653 | | 1970 | 1,750.9510524981 | | 1969 | 1,608.783864423 | | 1968 | 1,498.5165749172 | | 1967 | 1,343.3478612896 | | 1966 | 1,238.2304070894 | | 1965 | 1,134.3968303618 | | 1964 | 1,041.6703005355 | | 1963 | 886.19353934061 | | 1962 | 838.13755046632 | | 1961 | 752.01812774395 | | 1960 | 695.04348440925 |
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