Year | Value | 2020 | 5,511.5419436624 | 2019 | 6,082.5537735774 | 2018 | 6,128.698722555 | 2017 | 6,072.7875163813 | 2016 | 6,021.7154988057 | 2015 | 6,001.6674630286 | 2014 | 6,747.7720136093 | 2013 | 6,765.9049383841 | 2012 | 6,989.7669138905 | 2011 | 6,591.8944521156 | 2010 | 6,126.970025069 | 2009 | 5,385.3161861649 | 2008 | 5,876.3833771366 | 2007 | 4,941.9561092125 | 2006 | 4,208.1119775561 | 2005 | 3,634.3121041455 | 2004 | 3,148.562922417 | 2003 | 2,749.2061145562 | 2002 | 2,565.3913542198 | 2001 | 2,593.167951047 | 2000 | 2,593.0166263786 | 1999 | 2,456.9275322179 | 1998 | 2,356.1760289588 | 1997 | 2,412.8374886849 | 1996 | 2,322.1051718961 | 1995 | 2,136.2899178857 | 1994 | 1,902.9827742843 | 1993 | 1,877.9199909826 |
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