Year | Value | 2022 | 66.863349159287 | 2021 | 66.820741573067 | 2020 | 67.097251753375 | 2019 | 66.404425936088 | 2018 | 66.864531625034 | 2017 | 66.106748079487 | 2016 | 66.348139715185 | 2015 | 66.074859179077 | 2014 | 67.656311913711 | 2013 | 69.292468326458 | 2012 | 68.876635153801 | 2011 | 69.028164427102 | 2010 | 69.583031754102 | 2009 | 69.305594893686 | 2008 | 66.508090807003 | 2007 | 65.183171124589 | 2006 | 66.89480614045 | 2005 | 68.120292147464 | 2004 | 69.348179580002 | 2003 | 71.823817086318 | 2002 | 70.709354428978 | 2001 | 69.178628729267 | 2000 | 69.91806105631 | 1999 | 70.652597023591 | 1998 | 69.37217614197 | 1997 | 71.162908214207 | 1996 | 68.72508206893 | 1995 | 68.895124117807 | 1994 | 70.404140427476 | 1993 | 70.830833095498 | 1992 | 71.816967554341 | 1991 | 68.95545719729 | 1990 | 71.196707275932 |
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