Year | Value | 2022 | 76.909406888808 | 2021 | 76.97812787357 | 2020 | 77.194284471386 | 2019 | 78.336253852 | 2018 | 78.511470468219 | 2017 | 78.764861166264 | 2016 | 78.857291339344 | 2015 | 81.589835690905 | 2014 | 81.212611902464 | 2013 | 81.531235134687 | 2012 | 80.028822370635 | 2011 | 80.086318947293 | 2010 | 80.575222393597 | 2009 | 80.185723526082 | 2008 | 79.220889937304 | 2007 | 79.464864081836 | 2006 | 78.77112815946 | 2005 | 77.843549853659 | 2004 | 77.356542723693 | 2003 | 77.402776204195 | 2002 | 77.412754083146 | 2001 | 77.363669514733 | 2000 | 76.411315644709 | 1999 | 75.847504028284 | 1998 | 76.436098471431 | 1997 | 76.797603402365 | 1996 | 75.961962015306 | 1995 | 75.987470850216 | 1994 | 75.936064158274 | 1993 | 75.890355441222 | 1992 | 75.802921701318 | 1991 | 76.524851421036 |
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