Year | Value | 2022 | 88.333175004431 | 2021 | 88.336508007392 | 2020 | 88.865741868133 | 2019 | 87.586630882053 | 2018 | 87.272325569522 | 2017 | 87.126872257063 | 2016 | 87.085983648296 | 2015 | 87.093039851568 | 2014 | 87.088371471447 | 2013 | 87.022752848764 | 2012 | 86.862292198299 | 2011 | 86.699652872435 | 2010 | 86.496003120544 | 2009 | 86.277332388419 | 2008 | 86.063899730021 | 2007 | 85.716124448842 | 2006 | 85.386402035707 | 2005 | 85.033210189324 | 2004 | 84.739721804801 | 2003 | 84.543947598237 | 2002 | 84.473809450111 | 2001 | 84.442411538488 | 2000 | 84.414133556376 | 1999 | 84.44390342221 | 1998 | 84.518387896445 | 1997 | 84.566475803666 | 1996 | 84.623857952741 | 1995 | 84.737324121442 | 1994 | 84.821884963465 | 1993 | 84.864954221426 | 1992 | 84.97243334027 | 1991 | 85.056813654401 |
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