Year | Value | 2022 | 0.49920686499013 | 2021 | 0.49637847362183 | 2020 | 0.57505175565125 | 2019 | 0.50568051974636 | 2018 | 0.43744477488464 | 2017 | 0.47962579758635 | 2016 | 0.51188884413267 | 2015 | 0.46720371675054 | 2014 | 0.48676155038785 | 2013 | 0.50994759495067 | 2012 | 0.52758789938901 | 2011 | 0.5806402387171 | 2010 | 0.65059092557702 | 2009 | 0.67975102214393 | 2008 | 0.6163691989291 | 2007 | 0.61769072153659 | 2006 | 0.65305175069402 | 2005 | 0.81960496804749 | 2004 | 0.6705300171599 | 2003 | 0.63012290875667 | 2002 | 0.63584606729553 | 2001 | 0.66691744936559 | 2000 | 0.62551734867883 | 1999 | 0.68365467249905 | 1998 | 0.73147185813866 | 1997 | 0.82469119366237 | 1996 | 0.8748123692217 | 1995 | 0.84235824791852 | 1994 | 1.0240591150414 | 1993 | 1.0019610478445 | 1992 | 0.9731833989635 | 1991 | 0.8711198922446 | 1990 | 0.91491801223246 | 1989 | 1.1081848374407 | 1988 | 1.2210667314278 | 1987 | 1.4562577686623 | 1986 | 1.2691838259051 | 1985 | 1.2762510344569 |
|