| Year | Value | | 2021 | 8,588.53476 | | 2020 | 7,344.759036 | | 2019 | 7,188.04334 | | 2018 | 7,323.03958 | | 2017 | 7,321.11217 | | 2016 | 6,877.761503 | | 2015 | 6,309.473324 | | 2014 | 5,753.111628 | | 2013 | 5,224.838626 | | 2012 | 4,402.974 | | 2011 | 4,653.873 | | 2010 | 4,573.109 | | 2009 | 8,369.219 | | 2008 | 5,357.932 | | 2007 | 5,512.271 | | 2006 | 5,270.266 | | 2005 | 5,149.686 | | 2004 | 4,670.208 | | 2003 | 4,347.781 | | 2002 | 4,157.515 | | 2001 | 3,768.187 | | 2000 | 3,523.142 | | 1999 | 2,506.1000976563 | | 1998 | 2,245.5 | | 1997 | 2,260.1999511719 |
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