Year | Value | 2022 | 0.66227526426655 | 2021 | 0.7628736050696 | 2020 | 0.76221922922041 | 2019 | 0.72456381301499 | 2018 | 0.7554853674132 | 2017 | 0.79290705053538 | 2016 | 0.82529575424807 | 2015 | 0.8508103586972 | 2014 | 0.87435693699302 | 2013 | 0.88724562844361 | 2012 | 0.86124519698419 | 2011 | 0.76783353955884 | 2010 | 0.69515608509071 | 2009 | 0.6831287336645 | 2008 | 0.67171521459233 | 2007 | 0.66184074593918 | 2006 | 0.66352925121756 | 2005 | 0.67161375442316 | 2004 | 0.71109455859415 | 2003 | 0.46918798710334 | 2002 | 0.27293729675014 | 2001 | 0.46803696003657 | 2000 | 0.56848301332688 | 1999 | 0.58491503377668 | 1998 | 0.6148808741241 | 1997 | 0.66826931841088 | 1996 | 0.75249510203313 | 1995 | 0.85507725408966 | 1994 | 0.97494283223464 | 1993 | 1.1150976956679 | 1992 | 1.2769224986898 | 1991 | 0.71527681029284 | 1990 | 0.17854355606191 | 1989 | 0.65595084042011 | 1988 | 0.72028883411506 | 1987 | 0.29182320751582 | 1986 | 0.31468887183814 | 1985 | 0.95707894614527 | 1984 | 1.4570899112055 | 1983 | 1.6876694144696 | 1982 | 1.3684270360403 | 1981 | 0.40408347101641 | 1980 | 0.42508481517962 | 1979 | 0.59564799540013 | 1978 | 0.5391914801425 | 1977 | 0.46812782915523 | 1976 | 0.39598702915059 | 1975 | 0.37289519461784 | 1974 | 0.36640199833551 | 1973 | 0.34572291983233 | 1972 | 0.31510495680225 | 1971 | 0.2625059152272 | 1970 | 0.18304188273763 | 1969 | 0.0818053784682 | 1968 | 0.079784686583223 | 1967 | 0.28836104547115 | 1966 | 0.47329433560728 | 1965 | 0.6260264829797 | 1964 | 0.75169381429236 | 1963 | 0.86040316414711 | 1962 | 1.0002803807745 | 1961 | 1.4020603691052 |
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