| Year | Value | | 2021 | 22,462.364753588 | | 2020 | 19,133.100649843 | | 2019 | 19,062.769488821 | | 2018 | 18,854.373307904 | | 2017 | 16,600.900748469 | | 2016 | 14,872.602416664 | | 2015 | 14,040.886020332 | | 2014 | 16,276.911327759 | | 2013 | 15,315.388435921 | | 2012 | 13,778.337233375 | | 2011 | 13,704.931508402 | | 2010 | 11,282.422335869 | | 2009 | 11,532.879939404 | | 2008 | 14,305.919160052 | | 2007 | 13,193.380317423 | | 2006 | 10,243.972630128 | | 2005 | 8,538.238628976 | | 2004 | 7,216.3640414905 | | 2003 | 5,854.6973229838 | | 2002 | 4,381.9896922515 | | 2001 | 3,713.5167609268 | | 2000 | 3,360.6780606812 |
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