Year | Value | 2022 | 87.829846474576 | 2021 | 87.776141732606 | 2020 | 87.663838490942 | 2019 | 87.786683962538 | 2018 | 87.7166315427 | 2017 | 87.553241128935 | 2016 | 87.404257633589 | 2015 | 87.240342483955 | 2014 | 87.004013426446 | 2013 | 86.858779032141 | 2012 | 86.655718136024 | 2011 | 86.534417626918 | 2010 | 86.288127535255 | 2009 | 86.272605283847 | 2008 | 86.255832890377 | 2007 | 85.969887994884 | 2006 | 85.674587837537 | 2005 | 85.395700690575 | 2004 | 85.180887637556 | 2003 | 85.037219283019 | 2002 | 85.024469876995 | 2001 | 84.816381431409 | 2000 | 84.542081275034 | 1999 | 84.29938019388 | 1998 | 84.072722921329 | 1997 | 83.64801195657 | 1996 | 83.580189141158 | 1995 | 83.34235850306 | 1994 | 83.245395870244 | 1993 | 83.183891173256 | 1992 | 82.992898149473 | 1991 | 82.829171107407 |
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