Year | Value | 2014 | 2,202.3939182885 | 2013 | 2,092.5365206295 | 2012 | 2,052.6509652118 | 2011 | 1,705.4246326371 | 2010 | 1,603.4313740649 | 2009 | 1,620.3874199013 | 2008 | 2,040.7604354474 | 2007 | 2,118.2105275425 | 2006 | 2,552.2862143543 | 2005 | 2,388.3887343077 | 2004 | 2,281.9478721483 | 2003 | 2,235.4598559648 | 2002 | 1,996.7082520084 | 2001 | 2,106.4700660815 | 2000 | 2,040.4790895311 | 1999 | 2,022.485985406 | 1998 | 1,936.9392139517 | 1997 | 1,813.670143208 | 1996 | 1,852.8919232256 | 1995 | 1,952.0224858 | 1994 | 1,961.9432505545 | 1993 | 2,119.7363505364 | 1992 | 2,276.0615276244 | 1991 | 2,631.0288394097 | 1990 | 2,569.8238376631 |
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