Year | Value | 2020 | 0.60905726948479 | 2019 | 0.60516139370854 | 2018 | 0.62141336726906 | 2017 | 0.62368974295112 | 2016 | 0.62474477348319 | 2015 | 0.63125697814981 | 2014 | 0.64738993900214 | 2013 | 0.65079779410395 | 2012 | 0.6524979379413 | 2011 | 0.65371427263282 | 2010 | 0.64685838558055 | 2009 | 0.64658664024728 | 2008 | 0.63388202075503 | 2007 | 0.63694521352243 | 2006 | 0.71139862546456 | 2005 | 0.72960408991809 | 2004 | 0.71740974007742 | 2003 | 0.74793203699758 | 2002 | 0.75182800444214 | 2001 | 0.75497066324898 | 2000 | 0.78536652955466 | 1999 | 0.78617666225064 | 1998 | 0.80040918132385 | 1997 | 0.79170578612437 | 1996 | 0.85840781858322 | 1995 | 0.87664298589202 | 1994 | 0.66450379752423 | 1993 | 0.70884421896854 | 1992 | 0.74570181986959 | 1991 | 0.78345467002614 |
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