Year | Value | 2021 | 33,401 | 2020 | 33,399 | 2019 | 33,423 | 2018 | 33,440 | 2017 | 33,488 | 2016 | 33,380 | 2015 | 33,332 | 2014 | 33,426 | 2013 | 33,449 | 2012 | 33,506 | 2011 | 33,575.872 | 2010 | 33,714.093 | 2009 | 33,721.305 | 2008 | 33,862.3 | 2007 | 33,977.603 | 2006 | 34,128.4 | 2005 | 34,228.19 | 2004 | 34,724.575 | 2003 | 36,054 | 2002 | 35,868 | 2001 | 36,050 | 2000 | 36,642 | 1999 | 37,589 | 1998 | 38,150 | 1997 | 38,450 | 1996 | 40,826 | 1995 | 41,718 |
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