| Year | Value | | 2021 | 8,303.116562343 | | 2020 | 5,857.6146885513 | | 2019 | 8,767.2717417649 | | 2018 | 8,595.5900050616 | | 2017 | 8,139.6228797815 | | 2016 | 7,770.6788494839 | | 2015 | 7,619.88114612 | | 2014 | 7,093.191283824 | | 2013 | 6,454.1851734124 | | 2012 | 5,942.9986519726 | | 2011 | 5,825.3804681553 | | 2010 | 5,512.2282271487 | | 2009 | 5,306.4571215814 | | 2008 | 5,231.2877850769 | | 2007 | 4,315.4515923622 | | 2006 | 4,365.2489719907 | | 2005 | 3,269.0232638425 | | 2004 | 3,478.4103222252 | | 2003 | 3,020.6773767753 | | 2002 | 2,624.3539050599 | | 2001 | 2,600.8912819165 | | 2000 | 1,867.8727247585 | | 1999 | 1,778.4081686778 | | 1998 | 1,657.005813259 | | 1997 | 1,592.6182301431 | | 1996 | 1,454.3695448061 | | 1995 | 1,317.6407007236 | | 1994 | 1,125.8958964126 | | 1993 | 1,017.2244854958 | | 1992 | 942.79577179493 | | 1991 | 831.34870590112 | | 1990 | 786.0632619328 | | 1989 | 721.52801482083 | | 1988 | 687.41203380822 | | 1987 | 527.96302713811 | | 1986 | 554.13621467653 | | 1985 | 554.84006955627 |
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