| Year | Value | | 2021 | 11,533.04853603 | | 2020 | 9,166.3712826 | | 2019 | 7,763.6192142393 | | 2018 | 7,969.86364 | | 2017 | 7,901.65234423 | | 2016 | 6,942.706331998 | | 2015 | 6,986.405444999 | | 2014 | 7,184.1462080256 | | 2013 | 7,335.6994020432 | | 2012 | 7,236.9806302701 | | 2011 | 7,716.7619029853 | | 2010 | 7,487.4810007652 | | 2009 | 10,187.719 | | 2008 | 8,352.882 | | 2007 | 8,528.959 | | 2006 | 8,133.987 | | 2005 | 7,722.133 | | 2004 | 8,065.6 | | 2003 | 7,295.67 | | 2002 | 7,195.804 | | 2001 | 7,026.248 | | 2000 | 7,127.713 | | 1999 | 6,610.7001953125 | | 1998 | 6,233.7998046875 | | 1997 | 6,183.8999023438 | | 1996 | 6,036.2998046875 | | 1995 | 5,835.8999023438 | | 1994 | 5,373.2998046875 | | 1993 | 4,639.8999023438 | | 1992 | 4,287.5 | | 1991 | 4,108.7001953125 | | 1990 | 3,994.1999511719 | | 1989 | 3,840.3000488281 | | 1988 | 3,470 | | 1987 | 3,247.6999511719 | | 1986 | 2,826.8999023438 | | 1985 | 2,378.5 | | 1984 | 2,235.5 | | 1983 | 1,941 | | 1982 | 1,592.0999755859 | | 1981 | 1,495.1999511719 | | 1980 | 1,506 | | 1979 | 1,513.5 | | 1978 | 1,344.8000488281 | | 1977 | 1,204.1999511719 | | 1976 | 1,040.5 | | 1975 | 920.700012207 | | 1974 | 941 | | 1973 | 826.799987793 | | 1972 | 656.5999755859 | | 1971 | 532.9000244141 | | 1970 | 484.5 |
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