Year | Value | 2022 | 85.160585648075 | 2021 | 85.094397460692 | 2020 | 85.039415459344 | 2019 | 85.166841368688 | 2018 | 85.381407010946 | 2017 | 84.969183051031 | 2016 | 84.316844877023 | 2015 | 84.901668978439 | 2014 | 86.015547246954 | 2013 | 87.289568265945 | 2012 | 87.824759550831 | 2011 | 87.136088063068 | 2010 | 88.11972388884 | 2009 | 88.153051066198 | 2008 | 88.595166791201 | 2007 | 88.495828164149 | 2006 | 88.496821809009 | 2005 | 88.347215244372 | 2004 | 88.11199351917 | 2003 | 87.920087014896 | 2002 | 87.733195871004 | 2001 | 87.404929940623 | 2000 | 87.50849855334 | 1999 | 87.371309777858 | 1998 | 87.35467540733 | 1997 | 87.645676738846 | 1996 | 87.704792567444 | 1995 | 87.806734622919 | 1994 | 87.871656594772 | 1993 | 87.919803498054 | 1992 | 87.951755059302 | 1991 | 87.931897336376 |
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