Year | Value | 2022 | 72.633347880697 | 2021 | 72.384137312114 | 2020 | 71.946834933731 | 2019 | 72.436426729248 | 2018 | 72.018576330013 | 2017 | 71.807541707449 | 2016 | 71.689615632463 | 2015 | 70.570659292212 | 2014 | 70.315031881024 | 2013 | 69.835835382244 | 2012 | 72.449575780263 | 2011 | 73.182628102446 | 2010 | 76.128136151064 | 2009 | 76.261993874395 | 2008 | 76.446965047368 | 2007 | 76.656610823239 | 2006 | 74.280694960845 | 2005 | 75.041120878347 | 2004 | 72.264458039871 | 2003 | 73.025488928118 | 2002 | 71.930447169273 | 2001 | 72.470750472945 | 2000 | 73.808544828798 | 1999 | 74.430862577085 | 1998 | 74.407934456862 | 1997 | 73.369455932389 | 1996 | 74.691138478615 | 1995 | 74.856398795782 | 1994 | 75.343644531861 | 1993 | 75.378609152959 | 1992 | 75.405554600799 | 1991 | 73.096357300329 |
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