Year | Value | 2022 | 88.187547039701 | 2021 | 87.927295208577 | 2020 | 87.837104081617 | 2019 | 87.964626733199 | 2018 | 87.878248612939 | 2017 | 87.743599281749 | 2016 | 87.616738834256 | 2015 | 87.481390500123 | 2014 | 87.3167343035 | 2013 | 87.079629447289 | 2012 | 86.930078780573 | 2011 | 86.863215030858 | 2010 | 86.747754427714 | 2009 | 86.703297720795 | 2008 | 86.707115934145 | 2007 | 86.447115300827 | 2006 | 86.172902843709 | 2005 | 85.981517840387 | 2004 | 85.864630988447 | 2003 | 86.021135434691 | 2002 | 86.105027198337 | 2001 | 86.164198450916 | 2000 | 85.934504350921 | 1999 | 85.737194932389 | 1998 | 85.492417233976 | 1997 | 85.043225692309 | 1996 | 84.849967102719 | 1995 | 84.716333354217 | 1994 | 84.580052239735 | 1993 | 84.523610951579 | 1992 | 84.32811402519 | 1991 | 84.137610424678 |
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