| Year | Value | | 2014 | 6,319.7431508132 | | 2013 | 6,501.7849492272 | | 2012 | 6,601.4023358149 | | 2011 | 6,608.9113532449 | | 2010 | 6,736.8193588003 | | 2009 | 6,461.9756830138 | | 2008 | 6,817.1152136166 | | 2007 | 6,822.4524709472 | | 2006 | 6,815.6713703368 | | 2005 | 6,743.2372502407 | | 2004 | 6,698.2786303962 | | 2003 | 6,575.1782555489 | | 2002 | 6,437.1365775627 | | 2001 | 6,332.6872584906 | | 2000 | 6,189.1368764044 | | 1999 | 6,015.9228349979 | | 1998 | 5,883.1174071214 | | 1997 | 5,751.4341677895 | | 1996 | 5,653.7526190425 | | 1995 | 5,517.0022493347 | | 1994 | 5,395.2861777499 | | 1993 | 5,312.3420199328 | | 1992 | 5,369.0610525504 | | 1991 | 5,359.9404548095 | | 1990 | 5,271.40135393 | | 1989 | 5,285.9029727727 | | 1988 | 5,144.111586682 | | 1987 | 5,005.6882569086 | | 1986 | 4,851.1759396909 | | 1985 | 4,739.6827440415 | | 1984 | 4,558.0610100134 | | 1983 | 4,355.5546555521 | | 1982 | 4,254.033978933 | | 1981 | 4,245.4306655871 | | 1980 | 4,204.6650467368 | | 1979 | 4,115.6238115643 | | 1978 | 3,918.9254797105 | | 1977 | 3,720.9649343317 | | 1976 | 3,629.6505382666 | | 1975 | 3,336.8723431312 | | 1974 | 3,382.2426317694 | | 1973 | 3,266.2612028616 | | 1972 | 3,034.4778720791 | | 1971 | 2,825.3869163417 | | 1970 | 2,678.4021346387 | | 1969 | 2,274.9588655302 | | 1968 | 2,089.2401778049 | | 1967 | 1,938.3237035645 | | 1966 | 1,845.7887221902 | | 1965 | 1,730.7606468496 | | 1964 | 1,625.8909592353 | | 1963 | 1,501.4983199433 | | 1962 | 1,394.8064951701 | | 1961 | 1,296.4992329497 | | 1960 | 1,215.7240415782 |
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