Year | Value | 2022 | 65.045225081627 | 2021 | 64.752820562767 | 2020 | 64.324449457189 | 2019 | 63.701943195678 | 2018 | 62.893429844592 | 2017 | 63.160917041937 | 2016 | 63.443546459499 | 2015 | 61.557853606574 | 2014 | 60.914809127097 | 2013 | 60.792502145872 | 2012 | 61.23248928856 | 2011 | 60.67770319601 | 2010 | 60.718835280065 | 2009 | 59.564182230042 | 2008 | 59.23410082295 | 2007 | 57.957411015001 | 2006 | 58.626748217119 | 2005 | 57.28630245906 | 2004 | 56.216098540064 | 2003 | 56.548936302696 | 2002 | 56.908783537162 | 2001 | 57.029475285487 | 2000 | 56.647404896569 | 1999 | 56.846078193916 | 1998 | 56.527056507524 | 1997 | 56.56492869912 | 1996 | 56.178801689562 | 1995 | 55.585250937867 | 1994 | 55.370318451071 | 1993 | 55.040114774851 | 1992 | 54.916732398635 | 1991 | 54.79008798197 |
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