Year | Value | 2022 | 0.54807628184206 | 2021 | 0.57931767714229 | 2020 | 0.66163078568482 | 2019 | 0.49077292454308 | 2018 | 0.54485093949957 | 2017 | 0.53085719009798 | 2016 | 0.61182692997697 | 2015 | 0.558982325875 | 2014 | 0.54080744733525 | 2013 | 0.53030391331819 | 2012 | 0.55576513540348 | 2011 | 0.52324106120581 | 2010 | 0.49506194666129 | 2009 | 0.49087761147752 | 2008 | 0.60126938191057 | 2007 | 0.52470316935221 | 2006 | 0.56474120822298 | 2005 | 0.64949723334012 | 2004 | 0.63097843761799 | 2003 | 0.6487535587648 | 2002 | 0.66548029000165 | 2001 | 0.75361519723137 | 2000 | 1.1540259131391 | 1999 | 0.83854320116295 | 1998 | 0.85854044248748 | 1997 | 0.83100745513756 | 1996 | 0.8441753102704 | 1995 | 1.2650808511315 | 1994 | 0.83887858948984 | 1993 | 0.75658053111953 | 1992 | 0.99259247106306 | 1988 | 1.9138856061161 | 1987 | 2.1036761741143 | 1986 | 2.3355314806092 | 1985 | 2.4634443863568 | 1984 | 2.7923989651173 |
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