| Year | Value | | 2021 | 604.020922 | | 2020 | 684.208676 | | 2019 | 2,327.667095 | | 2018 | 2,666.263256 | | 2017 | 2,511.891367964 | | 2016 | 2,160.069653102 | | 2015 | 2,136.7284793951 | | 2014 | 2,524.64667 | | 2013 | 2,640.367634 | | 2012 | 2,758.4388360957 | | 2011 | 2,870.7888829106 | | 2010 | 2,938.670391666 | | 2009 | 2,132.553 | | 2008 | 2,288.961 | | 2007 | 2,454.554 | | 2006 | 2,106.87 | | 2005 | 2,002.424 | | 2004 | 1,868.578 | | 2003 | 1,764.122 | | 2002 | 1,823.591 | | 2001 | 1,669.242 | | 2000 | 1,712.88 | | 1999 | 1,670.5999755859 | | 1998 | 1,522.1999511719 | | 1997 | 1,628.3000488281 | | 1996 | 1,348.1999511719 | | 1995 | 1,307.9000244141 | | 1994 | 1,236.6999511719 | | 1993 | 1,060.3000488281 | | 1992 | 925.9000244141 | | 1991 | 866.200012207 | | 1990 | 661 | | 1989 | 612.700012207 | | 1988 | 588 | | 1987 | 491.8999938965 | | 1986 | 464.5 | | 1985 | 419.5 | | 1984 | 399.200012207 | | 1983 | 327.6000061035 | | 1982 | 306.700012207 | | 1981 | 268.200012207 | | 1980 | 238.6000061035 | | 1979 | 176 | | 1978 | 134.3999938965 | | 1977 | 104.6999969482 | | 1976 | 122.3000030518 | | 1975 | 101.6999969482 |
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