| Year | Value | | 2021 | 7,431.6405627674 | | 2020 | 6,351.2697356067 | | 2019 | 5,940.8043787315 | | 2018 | 5,868.8070715585 | | 2017 | 5,026.2218261841 | | 2016 | 4,679.4135149711 | | 2015 | 4,584.5572617475 | | 2014 | 5,426.7313563213 | | 2013 | 5,535.6740490355 | | 2012 | 4,879.4437175488 | | 2011 | 5,472.7811894726 | | 2010 | 4,773.5058892882 | | 2009 | 5,151.2269919136 | | 2008 | 5,846.6812647207 | | 2007 | 4,786.6358165199 | | 2006 | 3,630.3993030382 |
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