Year | Value | 2022 | 75.219278618097 | 2021 | 75.111575485653 | 2020 | 74.993792552502 | 2019 | 75.102440848956 | 2018 | 78.642882803217 | 2017 | 77.212416991869 | 2016 | 75.600698909426 | 2015 | 75.777875795339 | 2014 | 76.955286626964 | 2013 | 74.570967632847 | 2012 | 72.607998430719 | 2011 | 74.748266674916 | 2010 | 73.44067089578 | 2009 | 72.792250261566 | 2008 | 72.484866851946 | 2007 | 73.005663034714 | 2006 | 72.514395431253 | 2005 | 73.51206210253 | 2004 | 74.509520813452 | 2003 | 75.304317126057 | 2002 | 76.051448708571 | 2001 | 76.602449532482 | 2000 | 75.92765362342 | 1999 | 75.693190777943 | 1998 | 74.98817167643 | 1997 | 73.716991987991 | 1996 | 72.629608763445 | 1995 | 71.356561937125 | 1994 | 70.91713218753 | 1993 | 70.6422530573 | 1992 | 70.470027706047 | 1991 | 70.416445062345 |
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