Year | Value | 2022 | 80.826271186441 | 2021 | 80.794094447683 | 2020 | 80.765932873692 | 2019 | 80.921785538485 | 2018 | 80.85877462624 | 2017 | 80.868343378285 | 2016 | 80.903479738796 | 2015 | 80.987567122147 | 2014 | 81.091673397459 | 2013 | 81.220543806647 | 2012 | 81.366856455644 | 2011 | 81.552449012518 | 2010 | 81.730105795768 | 2009 | 81.871197980638 | 2008 | 81.89857797626 | 2007 | 81.858341192237 | 2006 | 81.204865261191 | 2005 | 80.560940273838 | 2004 | 79.79116181839 | 2003 | 78.851138874724 | 2002 | 77.775367192415 | 2001 | 77.187946760055 | 2000 | 76.604034294904 | 1999 | 75.907514182628 | 1998 | 75.259127337489 | 1997 | 74.68217637845 | 1996 | 74.118041083656 | 1995 | 74.18329731791 | 1994 | 74.34377315808 | 1993 | 74.463490885969 | 1992 | 74.601801022202 | 1991 | 74.750262155748 |
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