| Year | Value | | 2021 | 6,611.3023147229 | | 2020 | 6,769.0598681676 | | 2019 | 6,710.9628126688 | | 2018 | 6,607.2019738199 | | 2017 | 6,649.911891667 | | 2016 | 5,751.4214874594 | | 2015 | 8,079.618062633 | | 2014 | 8,915.1585930291 | | 2013 | 9,587.6956426455 | | 2012 | 8,029.0251934578 | | 2011 | 7,228.7409127493 | | 2010 | 5,831.4059472985 | | 2009 | 4,786.9136389398 | | 2008 | 5,137.5204574971 | | 2007 | 4,359.0100734063 | | 2006 | 2,986.3045630645 | | 2005 | 2,169.0084278585 | | 2004 | 1,803.7532658413 | | 2003 | 1,373.0216368705 | | 2002 | 1,077.3186080459 | | 2001 | 996.55457430651 | | 2000 | 735.19234282232 | | 1999 | 850.30100865653 | | 1997 | 1,139.1278796417 | | 1996 | 1,047.9130616203 | | 1995 | 1,037.6195234597 | | 1994 | 1,007.3182355004 | | 1993 | 1,121.2693210019 |
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