Year | Value | 2022 | 73.454290401561 | 2021 | 72.426578409543 | 2020 | 71.003826938006 | 2019 | 70.77674388744 | 2018 | 70.248463532953 | 2017 | 70.993265287556 | 2016 | 73.034573387176 | 2015 | 72.834822219679 | 2014 | 73.87223864873 | 2013 | 75.736799244139 | 2012 | 77.841986235063 | 2011 | 77.093562355308 | 2010 | 76.580193839997 | 2009 | 75.141999320534 | 2008 | 69.219282397914 | 2007 | 68.28241847624 | 2006 | 69.756381095457 | 2005 | 72.179107723778 | 2004 | 72.649347374886 | 2003 | 73.755418233578 | 2002 | 73.564317901499 | 2001 | 74.36638269255 | 2000 | 74.775079692371 | 1999 | 75.210966073659 | 1998 | 74.496116668777 | 1997 | 74.940387876123 | 1996 | 76.140635541193 | 1995 | 76.775654518924 |
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