| Year | Value | | 2021 | 14,553.412928143 | | 2020 | 11,828.053956223 | | 2019 | 12,740.008495652 | | 2018 | 12,669.631862438 | | 2017 | 11,349.110948819 | | 2016 | 10,236.258316206 | | 2015 | 9,996.7327769884 | | 2014 | 11,208.431819229 | | 2013 | 11,207.391370292 | | 2012 | 10,607.642932948 | | 2011 | 11,677.725467625 | | 2010 | 11,109.975745479 | | 2009 | 11,560.027428131 | | 2008 | 13,195.944739887 | | 2007 | 11,429.312701948 | | 2006 | 9,551.5496845702 | | 2005 | 8,699.7333721319 | | 2004 | 7,788.7795017295 | | 2003 | 6,414.8962649475 | | 2002 | 5,076.6774163481 | | 2001 | 4,265.1954737026 | | 2000 | 3,943.3581732951 | | 1999 | 4,265.5672244013 | | 1998 | 4,735.0134701873 | | 1997 | 4,419.4731105761 | | 1996 | 4,376.624838807 | | 1995 | 4,011.3376618398 |
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