Year | Value | 2022 | 91.417604132963 | 2021 | 91.172844948998 | 2020 | 91.476003061687 | 2019 | 91.661273096267 | 2018 | 91.863405422673 | 2017 | 91.544009208302 | 2016 | 91.211762975392 | 2015 | 91.133239708561 | 2014 | 91.029610771748 | 2013 | 90.872183498504 | 2012 | 90.727528708415 | 2011 | 90.89957503612 | 2010 | 90.849708257492 | 2009 | 90.338607030405 | 2008 | 90.830135505513 | 2007 | 90.988096844777 | 2006 | 90.945076044236 | 2005 | 91.11416687666 | 2004 | 91.226428470155 | 2003 | 90.862562361457 | 2002 | 91.126332775076 | 2001 | 91.121315567302 | 2000 | 90.878260633493 | 1999 | 90.716980464483 | 1998 | 90.302815124455 | 1997 | 90.565401541876 | 1996 | 90.670331249605 | 1995 | 90.456880175489 | 1994 | 90.170761758725 | 1993 | 89.24517515875 | 1992 | 89.263048769494 | 1991 | 89.171582445389 |
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