Year | Value | 2022 | 87.645690743571 | 2021 | 87.599940475385 | 2020 | 87.55406589433 | 2019 | 87.654776547765 | 2018 | 87.68546400219 | 2017 | 87.751215836701 | 2016 | 87.804911510495 | 2015 | 87.854697869368 | 2014 | 87.885633603953 | 2013 | 87.90488450896 | 2012 | 87.929174905626 | 2011 | 87.959448128668 | 2010 | 87.993860412946 | 2009 | 88.00645875071 | 2008 | 88.028702658398 | 2007 | 88.048956083513 | 2006 | 88.071626155023 | 2005 | 88.081567106519 | 2004 | 88.022793411851 | 2003 | 87.976342810774 | 2002 | 87.959733040251 | 2001 | 87.92969115218 | 2000 | 87.882140297298 | 1999 | 87.823355506282 | 1998 | 87.78682243396 | 1997 | 87.748698884758 | 1996 | 87.710527091998 | 1995 | 87.689940373149 | 1994 | 87.677055929609 | 1993 | 87.67251736162 | 1992 | 87.678068877477 | 1991 | 87.680715868019 |
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