Year | Value | 2022 | 67.872565905936 | 2021 | 66.482757275699 | 2020 | 67.493705852443 | 2019 | 67.78405755044 | 2018 | 68.101966323031 | 2017 | 68.558197072686 | 2016 | 69.101730509428 | 2015 | 69.471260572078 | 2014 | 70.638076842634 | 2013 | 70.530693034749 | 2012 | 70.720839996937 | 2011 | 68.373328781082 | 2010 | 67.59708354326 | 2009 | 66.784470044452 | 2008 | 66.279495198799 | 2007 | 65.246346169381 | 2006 | 64.10269932895 | 2005 | 63.326817188088 | 2004 | 63.436080829067 | 2003 | 62.84757224239 | 2002 | 62.871837529117 | 2001 | 62.997528310357 | 2000 | 62.805606993502 | 1999 | 62.514704973587 | 1998 | 63.103127262174 | 1997 | 63.230335848605 | 1996 | 64.002518126967 | 1995 | 62.590787014469 | 1994 | 62.450111336852 | 1993 | 62.481365747218 | 1992 | 62.613425587342 | 1991 | 62.912952131162 |
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