| Year | Value | | 2021 | 4,023.2514289473 | | 2020 | 3,818.0102992635 | | 2019 | 4,222.0882781968 | | 2018 | 3,859.4565629463 | | 2017 | 3,630.5411591645 | | 2016 | 3,245.3815561363 | | 2015 | 3,288.5840871909 | | 2014 | 3,675.9769642067 | | 2013 | 3,551.640905328 | | 2012 | 3,291.408226446 | | 2011 | 3,100.3237483188 | | 2010 | 2,850.6850315124 | | 2009 | 2,672.2591321755 | | 2008 | 3,669.3167491356 | | 2007 | 2,836.2842365656 | | 2006 | 1,934.0827263717 | | 2005 | 1,450.458901703 | | 2004 | 1,045.0872894331 | | 2003 | 800.1084183784 | | 2002 | 664.12245061727 | | 2001 | 589.47490673208 | | 2000 | 524.80258369214 | | 1999 | 503.41399386026 | | 1998 | 514.38627973959 | | 1997 | 450.88111706825 | | 1996 | 424.12982724085 | | 1995 | 388.8494301228 |
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