Year | Value | 2022 | 0.70040672489694 | 2021 | 0.47167835663609 | 2020 | 0.57578622567143 | 2019 | 0.546705762702 | 2018 | 0.50065564266188 | 2017 | 0.49511091722323 | 2016 | 0.37894915726333 | 2015 | 0.41557152794975 | 2014 | 0.36685682593698 | 2013 | 0.35849237579395 | 2012 | 0.35893725170731 | 2011 | 0.37677558880436 | 2010 | 0.44100949667964 | 2009 | 0.37131175711561 | 2008 | 0.36491279496482 | 2007 | 0.50162400683642 | 2006 | 0.52078771268481 | 2005 | 0.58477615707441 | 2004 | 0.61123547087958 | 2003 | 0.60717994174289 | 2002 | 0.58682553563861 | 2001 | 0.68028707976124 | 2000 | 0.54411854308622 | 1999 | 0.57140192589808 | 1998 | 0.63992050413869 | 1997 | 0.61389004012586 | 1996 | 0.58703604744991 | 1995 | 0.59532687818365 | 1994 | 0.74156143550964 | 1993 | 0.70715443383003 | 1992 | 0.82719840104998 | 1991 | 0.81138516310672 | 1990 | 0.78834468085592 | 1989 | 0.78845832033386 | 1988 | 0.9514945285946 | 1987 | 0.91591591860773 | 1986 | 0.83308684486445 | 1985 | 0.86755442504434 | 1984 | 1.042169628423 | 1983 | 1.0882412942735 | 1982 | 1.0771520075496 | 1981 | 1.0934200294763 | 1980 | 1.0418442034113 | 1979 | 0.91869585925598 | 1978 | 0.92919084097648 | 1977 | 0.90650494337788 | 1976 | 0.89099686313947 | 1975 | 0.86971894013407 | 1974 | 0.68500005628708 | 1973 | 0.7069351667124 | 1972 | 0.73804590334462 | 1971 | 0.71264682517639 | 1970 | 0.68199315241812 | 1969 | 0.73758077130624 | 1968 | 0.82502279442192 | 1967 | 0.99608587212709 | 1966 | 1.2118790158779 | 1965 | 1.2203151013483 | 1964 | 1.2458540083677 | 1963 | 1.0672209514909 | 1962 | 1.1624637164581 | 1961 | 1.0001520689673 | 1960 | 0.90695291928609 |
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