Year | Value | 2021 | 91.274576008072 | 2020 | 91.320681491831 | 2019 | 91.366786975589 | 2018 | 91.412892459347 | 2017 | 91.458997943106 | 2016 | 91.505103426864 | 2015 | 91.551208910622 | 2014 | 91.597322156246 | 2013 | 91.643435401871 | 2012 | 91.689548647495 | 2011 | 91.735661893119 | 2010 | 91.781775138743 | 2009 | 91.80140877867 | 2008 | 91.821042418597 | 2007 | 91.840676058524 | 2006 | 91.860309698452 | 2005 | 91.879943338378 | 2004 | 91.899576978306 | 2003 | 91.919210618233 | 2002 | 91.93884425816 | 2001 | 91.958477898087 | 2000 | 91.978111538014 | 1999 | 92.002025847014 | 1998 | 92.025940156014 | 1997 | 92.049854465013 | 1996 | 92.073768774013 | 1995 | 92.097683083013 | 1994 | 92.121597392013 | 1993 | 92.145511701013 | 1992 | 92.169426010013 | 1991 | 92.193340319013 | 1990 | 92.217254628013 |
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