| Year | Value | | 2021 | 62.722637168984 | | 2020 | 62.722637168984 | | 2019 | 62.702062807018 | | 2018 | 62.703529404263 | | 2017 | 62.70688595366 | | 2016 | 62.703661463526 | | 2015 | 62.697801674846 | | 2014 | 62.725043754477 | | 2013 | 62.718259253062 | | 2012 | 62.701247715187 | | 2011 | 62.697690869316 | | 2010 | 62.710061048724 | | 2009 | 62.707735894575 | | 2008 | 62.548791898831 | | 2007 | 62.561653840619 | | 2006 | 62.576427722478 | | 2005 | 62.152280424347 | | 2004 | 61.992372871724 | | 2003 | 74.920792079208 | | 2002 | 74.574257425743 | | 2001 | 74.574257425743 | | 2000 | 74.554455445545 | | 1999 | 73.930693069307 | | 1998 | 73.930693069307 | | 1997 | 72.871287128713 | | 1996 | 72.653465346535 | | 1995 | 73.336633663366 | | 1994 | 73.326732673267 | | 1993 | 73.267326732673 |
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