Year | Value | 2022 | 82.542720847247 | 2021 | 82.582525259252 | 2020 | 82.49213071582 | 2019 | 82.406921087845 | 2018 | 82.336333835747 | 2017 | 82.082179468334 | 2016 | 81.83933781986 | 2015 | 81.684056847178 | 2014 | 81.44493080967 | 2013 | 81.065153753393 | 2012 | 81.052434655339 | 2011 | 80.904672847022 | 2010 | 80.883563923907 | 2009 | 81.128272061267 | 2008 | 81.398656767898 | 2007 | 81.150358103299 | 2006 | 80.842084013575 | 2005 | 80.669348109981 | 2004 | 80.53999591097 | 2003 | 80.292810733397 | 2002 | 80.354544364146 | 2001 | 79.934884449754 | 2000 | 80.001591517923 | 1999 | 79.834453989545 | 1998 | 79.573586158133 | 1997 | 79.4485922041 | 1996 | 79.853583406592 | 1995 | 79.907940468656 | 1994 | 80.235986827155 | 1993 | 80.778443107549 | 1992 | 80.959726915139 | 1991 | 81.116536405377 |
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