| Year | Value | | 2021 | 3,961.404296875 | | 2020 | 3,317.0178222656 | | 2019 | 3,234.3354492188 | | 2018 | 2,723.015625 | | 2017 | 2,340.3950195312 | | 2016 | 1,910.0504150391 | | 2015 | 1,935.6566162109 | | 2014 | 2,651.2873535156 | | 2013 | 3,523.0607910156 | | 2012 | 3,400.2302246094 | | 2011 | 2,949.3334960938 | | 2010 | 2,467.4123535156 | | 2009 | 2,046.994140625 | | 2008 | 3,273.6997070312 | | 2007 | 2,583.1098632812 | | 2006 | 1,893.5885009766 | | 2005 | 1,503.6652832031 | | 2004 | 1,102.4527587891 | | 2003 | 828.95849609375 | | 2002 | 696.73480224609 | | 2001 | 615.06530761719 | | 2000 | 491.86245727539 | | 1999 | 488.9772644043 | | 1998 | 653.42028808594 | | 1997 | 778.71429443359 | | 1996 | 678.98583984375 | | 1995 | 730.712890625 |
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