| Year | Value | | 2021 | 559.44256741598 | | 2020 | 559.2657322747 | | 2019 | 585.82177296096 | | 2018 | 561.57801900726 | | 2017 | 682.30252934997 | | 2016 | 627.49444991624 | | 2015 | 627.87220866343 | | 2014 | 632.34709472214 | | 2013 | 595.23295521623 | | 2012 | 596.43843783317 | | 2011 | 606.68661475646 | | 2010 | 1,012.3605854058 | | 2009 | 953.51465396082 | | 2008 | 906.36173652385 | | 2007 | 769.6819403899 | | 2006 | 668.27076360006 | | 2005 | 593.39851052856 | | 2004 | 521.6553234702 | | 2003 | 448.30310087091 | | 2002 | 436.59661745377 | | 2001 | 427.68174953048 | | 2000 | 443.50638656847 |
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