Year | Value | 2021 | 1,843.5112960594 | 2020 | 2,004.0221295502 | 2019 | 2,023.5098665983 | 2018 | 2,064.0382062582 | 2017 | 1,999.7549136933 | 2016 | 1,909.3866433724 | 2015 | 2,020.1867367111 | 2014 | 2,255.7601210782 | 2013 | 2,029.4903379046 | 2012 | 2,092.4338123043 | 2011 | 1,551.6053667786 | 2010 | 1,264.9528066819 | 2009 | 1,133.1079273231 | 2008 | 1,116.976146558 | 2007 | 954.83453999564 | 2006 | 805.47810325453 | 2005 | 478.94110255342 | 2004 | 393.48054468309 | 2003 | 375.52526255469 | 2002 | 358.46915467795 | 2001 | 389.32899136067 | 2000 | 433.89887155624 | 1999 | 466.46760106461 | 1998 | 547.81288360869 | 1997 | 746.53462342096 | 1996 | 702.53067506043 | 1995 | 636.10074728946 | 1994 | 818.44461096937 | 1993 | 738.66943148188 | 1992 | 694.65658391398 | 1991 | 700.78484290439 | 1990 | 596.85761863623 | 1989 | 672.98074274066 | 1988 | 703.5615854742 | 1987 | 613.23083766144 | 1986 | 558.29797084649 | 1985 | 516.81931232638 | 1984 | 593.28893962048 | 1983 | 561.35045944144 | 1982 | 533.54813210973 | 1981 | 584.7352873079 | 1980 | 590.7567445954 |
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