Year | Value | 2014 | 43.426338940476 | 2013 | 47.144181858809 | 2012 | 49.157455204927 | 2011 | 48.805848124495 | 2010 | 50.196241476494 | 2009 | 52.400693134416 | 2008 | 52.432270932465 | 2007 | 51.574891627987 | 2006 | 58.797873992102 | 2005 | 65.709743123317 | 2004 | 71.600725203225 | 2003 | 71.115809103631 | 2002 | 64.715074553291 | 2001 | 59.261495578306 | 2000 | 58.59843320299 | 1999 | 52.834889714916 | 1998 | 58.280582914039 | 1997 | 48.697848325955 | 1996 | 46.557663418953 | 1995 | 53.471178145145 | 1994 | 49.418511462298 | 1993 | 58.833197947956 | 1992 | 46.269790365795 | 1991 | 43.587949313602 | 1990 | 45.0076745113 |
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