| Year | Value | | 2022 | 73.657544464794 | | 2021 | 80.921304914174 | | 2020 | 90.813479463863 | | 2019 | 76.435885287111 | | 2018 | 78.306280128982 | | 2017 | 78.155733736456 | | 2016 | 78.023883354769 | | 2015 | 78.588918026308 | | 2014 | 83.219603728946 | | 2013 | 84.96880203799 | | 2012 | 86.915556041658 | | 2011 | 87.519187727987 | | 2010 | 86.745171096411 | | 2009 | 82.077269217223 | | 2008 | 75.948503973461 | | 2007 | 78.103133375534 | | 2006 | 77.335191773822 | | 2005 | 75.739241568865 | | 2004 | 74.648420882589 | | 2003 | 78.450160701402 | | 2002 | 77.472164478742 | | 2001 | 74.39836354649 | | 2000 | 70.806744039028 | | 1999 | 73.800259403372 | | 1998 | 72.291177457229 | | 1997 | 73.45003646973 | | 1996 | 73.603238866397 | | 1995 | 70.431472081218 |
|