Year | Value | 2022 | 89.495405600745 | 2021 | 89.856339517131 | 2020 | 90.079158035157 | 2019 | 90.159335019463 | 2018 | 90.287207274459 | 2017 | 90.152639334797 | 2016 | 90.01045775817 | 2015 | 89.745520887319 | 2014 | 89.665941103907 | 2013 | 89.409545514658 | 2012 | 89.551785647327 | 2011 | 89.581637144157 | 2010 | 89.053831434226 | 2009 | 89.312114189564 | 2008 | 89.592537662268 | 2007 | 89.403604318085 | 2006 | 89.299145437634 | 2005 | 89.217674312526 | 2004 | 89.491492531852 | 2003 | 89.617441775254 | 2002 | 89.299076790033 | 2001 | 89.306172403496 | 2000 | 88.915422378814 | 1999 | 88.549700193632 | 1998 | 88.568769296111 | 1997 | 88.269630265257 | 1996 | 87.779591095601 | 1995 | 87.73992647772 | 1994 | 87.688721004257 | 1993 | 87.694823995929 | 1992 | 87.75958430881 | 1991 | 87.783744143663 |
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