Year | Value | 2022 | 61.819298208891 | 2021 | 61.587318321104 | 2020 | 61.328334817191 | 2019 | 62.295651607753 | 2018 | 60.955251751952 | 2017 | 60.571986296632 | 2016 | 60.213803853069 | 2015 | 59.940576384171 | 2014 | 59.515348374834 | 2013 | 59.317267364545 | 2012 | 59.314824981047 | 2011 | 59.993963895674 | 2010 | 57.837379658628 | 2009 | 58.797931138682 | 2008 | 61.33533628361 | 2007 | 63.321629631804 | 2006 | 61.40259368709 | 2005 | 62.225318888618 | 2004 | 61.264683895771 | 2003 | 61.251643316099 | 2002 | 61.545952813926 | 2001 | 59.720574570376 | 2000 | 59.25051078425 | 1999 | 59.203564777718 | 1998 | 59.350966030121 | 1997 | 59.795076231154 | 1996 | 59.794336841727 | 1995 | 59.870247240333 | 1994 | 58.79786551522 | 1993 | 58.599973842431 | 1992 | 56.689572641616 | 1991 | 56.42127856777 |
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