| Year | Value | | 2021 | 4,084.9705741153 | | 2020 | 3,499.6230532714 | | 2019 | 3,802.1266050094 | | 2018 | 3,863.8884082219 | | 2017 | 3,507.4790770538 | | 2016 | 3,259.6032834969 | | 2015 | 3,333.0612510476 | | 2014 | 4,038.9866622897 | | 2013 | 3,904.2953019426 | | 2012 | 3,765.0706750428 | | 2011 | 3,350.5453425474 | | 2010 | 2,713.9400986359 | | 2009 | 2,433.0372379156 | | 2008 | 2,882.5801867439 | | 2007 | 2,296.3834256617 | | 2006 | 1,774.220478202 | | 2005 | 1,441.3367400695 | | 2004 | 1,146.5455577215 | | 2003 | 865.46802792704 | | 2002 | 735.49523797955 | | 2001 | 694.34413711137 | | 2000 | 653.50899281355 | | 1999 | 606.47857747849 | | 1998 | 780.67576854883 |
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