| Year | Value | | 2021 | 4,107.03 | | 2020 | 2,467.943 | | 2019 | 4,522.586 | | 2018 | 4,443.789 | | 2017 | 4,260.597 | | 2016 | 4,155.407 | | 2015 | 4,098.31 | | 2014 | 4,151.293 | | 2013 | 4,327.126 | | 2012 | 4,626.1538096119 | | 2011 | 5,068.7622639276 | | 2010 | 5,079.7181476491 | | 2009 | 6,624.89 | | 2008 | 6,187.796 | | 2007 | 6,424.966 | | 2006 | 6,135.028 | | 2005 | 5,802.442 | | 2004 | 5,584.213 | | 2003 | 5,067.323 | | 2002 | 5,030.16 | | 2001 | 4,825.202 | | 2000 | 5,224.34 | | 1999 | 4,968.3999023438 | | 1998 | 4,773.6000976563 | | 1997 | 5,132 | | 1996 | 4,842.6000976563 | | 1995 | 4,577.7001953125 | | 1994 | 4,385.8999023438 | | 1993 | 3,717.1000976563 | | 1992 | 3,840.5 | | 1991 | 3,778.8000488281 | | 1990 | 3,995.8000488281 | | 1989 | 3,819.3000488281 | | 1988 | 3,681.6000976563 | | 1987 | 3,385.6000976563 | | 1986 | 3,079.5 | | 1985 | 2,873.3000488281 | | 1984 | 2,797.6999511719 | | 1983 | 2,483.6999511719 | | 1982 | 2,186.1000976563 | | 1981 | 2,128.3999023438 | | 1980 | 1,985.8000488281 | | 1979 | 1,912.1999511719 | | 1978 | 1,697 | | 1977 | 1,557.4000244141 | | 1976 | 1,278.9000244141 | | 1975 | 995.299987793 | | 1974 | 871.299987793 | | 1973 | 757.5999755859 | | 1972 | 619 | | 1971 | 487.700012207 | | 1970 | 474.6000061035 |
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