Year | Value | 2022 | 83.96587847043 | 2021 | 83.802964836292 | 2020 | 83.969776500961 | 2019 | 83.820789107344 | 2018 | 83.618178774662 | 2017 | 83.515808363936 | 2016 | 83.377425857091 | 2015 | 83.199866978837 | 2014 | 83.020162182064 | 2013 | 82.752112955384 | 2012 | 82.566769577689 | 2011 | 82.447519841869 | 2010 | 82.400452768736 | 2009 | 82.450822524245 | 2008 | 82.747001389033 | 2007 | 82.639039982266 | 2006 | 82.203519443662 | 2005 | 81.900459345487 | 2004 | 81.557305535766 | 2003 | 81.36158321544 | 2002 | 81.387428275325 | 2001 | 81.345491490394 | 2000 | 81.273815069829 | 1999 | 80.844922975373 | 1998 | 80.534673155426 | 1997 | 79.965336694153 | 1996 | 79.945660726978 | 1995 | 79.729442551754 | 1994 | 79.450512665612 | 1993 | 79.42036184097 | 1992 | 79.315033680845 | 1991 | 79.212083057242 |
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