| Year | Value | | 2021 | 4,753.2552437963 | | 2020 | 4,098.9076949922 | | 2019 | 4,190.8652210881 | | 2018 | 3,942.5061353301 | | 2017 | 3,335.5368370167 | | 2016 | 2,721.0293022325 | | 2015 | 2,491.6751358452 | | 2014 | 3,280.6210089116 | | 2013 | 3,304.0594084603 | | 2012 | 3,043.2465579593 | | 2011 | 2,846.2737525018 | | 2010 | 2,325.8724408588 | | 2009 | 1,737.6538585523 | | 2008 | 2,007.0022503581 | | 2007 | 1,435.2183832013 | | 2006 | 1,133.8779327232 | | 2005 | 998.25620702563 | | 2004 | 850.46556212134 | | 2003 | 625.59474146362 | | 2002 | 499.13547879938 | | 2001 | 416.09366249617 | | 2000 | 339.6040304825 | | 1999 | 286.38682055512 | | 1998 | 432.87825288654 | | 1997 | 513.48954148352 | | 1996 | 453.31524198889 |
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