| Year | Value | | 2021 | 3,666.850451 | | 2020 | 3,019.926083 | | 2019 | 6,411.9898281565 | | 2018 | 6,947.4353277535 | | 2017 | 5,062.992579 | | 2016 | 6,695.8112759353 | | 2015 | 6,331.930303643 | | 2014 | 6,051.73592 | | 2013 | 6,360.12415 | | 2012 | 6,899.3731612271 | | 2011 | 7,300.7970480297 | | 2010 | 7,121.4146793229 | | 2009 | 7,390.959 | | 2008 | 7,310.158 | | 2007 | 7,955.56 | | 2006 | 7,981.253 | | 2005 | 7,571.26 | | 2004 | 7,192.818 | | 2003 | 6,653.356 | | 2002 | 6,772.231 | | 2001 | 5,773.731 | | 2000 | 6,004.887 | | 1999 | 5,451 | | 1998 | 4,724 | | 1997 | 4,740.7998046875 | | 1996 | 4,115 | | 1995 | 3,686.8999023438 | | 1994 | 3,245 | | 1993 | 2,813.3999023438 | | 1992 | 2,179.8999023438 | | 1991 | 1,740.8000488281 | | 1990 | 1,652.5 | | 1989 | 1,640.0999755859 | | 1988 | 1,398.3000488281 | | 1987 | 1,256.8000488281 | | 1986 | 1,111.8000488281 | | 1985 | 981 | | 1984 | 961.200012207 | | 1983 | 846 | | 1982 | 736.799987793 | | 1981 | 645.200012207 | | 1980 | 544.0999755859 | | 1979 | 560.299987793 | | 1978 | 408.200012207 | | 1977 | 248 | | 1976 | 181.6000061035 | | 1975 | 147 | | 1974 | 110.1999969482 | | 1973 | 68.1999969482 | | 1972 | 25.5 | | 1971 | 14.6000003815 | | 1970 | 9.3000001907 |
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