Year | Value | 2021 | 46.774733635278 | 2020 | 46.915725827109 | 2019 | 47.053169705766 | 2018 | 47.193886668811 | 2017 | 47.324980587866 | 2016 | 47.517732670756 | 2015 | 47.682603395408 | 2014 | 47.845393681059 | 2013 | 48.007436136549 | 2012 | 48.163490929633 | 2011 | 48.325468390709 | 2010 | 48.489163408565 | 2009 | 48.794766768195 | 2008 | 49.100370127825 | 2007 | 49.405973487456 | 2006 | 49.711604553227 | 2005 | 50.017180206717 | 2004 | 50.322867706809 | 2003 | 50.628499794621 | 2002 | 50.934132223114 | 2001 | 51.236852248263 | 2000 | 51.542439257644 | 1999 | 51.836040919758 | 1998 | 52.129642581873 | 1997 | 52.340169286591 | 1996 | 52.633305679035 | 1995 | 52.926442071479 | 1994 | 53.219578463923 | 1993 | 53.512714856367 | 1992 | 53.805851248811 | 1991 | 54.098987641255 | 1990 | 54.392124033699 |
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