Year | Value | 2022 | 0.85613243338284 | 2021 | 0.41160199653226 | 2020 | 0.43099681509972 | 2019 | 0.54046132709812 | 2018 | 0.45518469527502 | 2017 | 0.38522801837237 | 2016 | 0.50630000245138 | 2015 | 0.57944624167779 | 2014 | 0.44392928847521 | 2013 | 0.47134014396663 | 2012 | 0.62016357933738 | 2011 | 1.3010029017038 | 2010 | 0.91363939163171 | 2009 | 0.80459957261986 | 2008 | 0.78997684548015 | 2007 | 0.73433083076592 | 2006 | 0.6595582149807 | 2005 | 0.55005570808901 | 2004 | 0.43278824812917 | 2003 | 0.41864150806905 | 2002 | 0.44826889482156 | 2001 | 0.34395115762367 | 2000 | 0.24251795622133 | 1999 | 0.22918910302972 | 1998 | 0.21352765067094 | 1997 | 0.24199188498308 | 1996 | 0.1953931762382 | 1995 | 0.20943683802032 | 1994 | 0.30819707368673 | 1993 | 0.39063851782693 | 1992 | 0.40571349585634 | 1991 | 0.37159316566817 | 1990 | 0.29823570631359 | 1989 | 0.36324798587016 | 1988 | 0.31792624535866 | 1987 | 0.085252140812505 | 1986 | 0.035648850783236 | 1985 | 0.029786422643661 | 1984 | 0.001501707786783 | 1983 | 0.0079444706906212 | 1982 | 0.027176883483947 | 1981 | 0.0026371543402261 | 1980 | 0.1102111659859 | 1979 | 0.089882551263234 | 1978 | 0.093299959813025 | 1977 | 0.12347964539296 | 1976 | 0.17867444700566 | 1975 | 0.28897816112839 | 1974 | 0.314633664598 | 1973 | 0.3146587656936 | 1972 | 0.39158590745938 | 1971 | 0.18224707146775 | 1970 | 0.098613691502767 | 1969 | 0.28316966920229 | 1968 | 0.39339110773873 | 1967 | 0.55664555486267 | 1966 | 0.67546356713534 | 1965 | 0.9081370016866 | 1964 | 0.94647753571233 | 1963 | 0.74760693068263 | 1962 | 0.39805478680755 | 1961 | 0.33220594581809 |
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