Year | Value | 2022 | 0.45958354848833 | 2021 | 0.52859045291942 | 2020 | 0.6651766822468 | 2019 | 0.76610780208481 | 2018 | 0.79376815384809 | 2017 | 0.79226340042227 | 2016 | 0.8112564782781 | 2015 | 0.84599260134521 | 2014 | 0.85783482872481 | 2013 | 0.8683461501672 | 2012 | 0.90034336060122 | 2011 | 0.92858962950918 | 2010 | 0.93941802248079 | 2009 | 0.95314786455807 | 2008 | 0.98728420277606 | 2007 | 1.0320272332733 | 2006 | 1.0773538459077 | 2005 | 1.1172028776534 | 2004 | 1.1393930119919 | 2003 | 1.1856694393 | 2002 | 1.2628415362286 | 2001 | 1.3206947580714 | 2000 | 1.3667713297391 | 1999 | 1.4202222869143 | 1998 | 1.4683397085395 | 1997 | 1.5001514398019 | 1996 | 1.530465468329 | 1995 | 1.562366947606 | 1994 | 1.5901570368766 | 1993 | 1.6161651932013 | 1992 | 1.6585349314376 | 1991 | 1.7300615647074 | 1990 | 1.809855764448 | 1989 | 1.8751572597958 | 1988 | 1.9378520377065 | 1987 | 2.0013519805561 | 1986 | 2.0694663602534 | 1985 | 2.1387626446942 | 1984 | 2.1984857778889 | 1983 | 2.2485870849871 | 1982 | 2.2881375038652 | 1981 | 2.3275263851927 | 1980 | 2.3506755414229 | 1979 | 2.3574012265739 | 1978 | 2.3630289241304 | 1977 | 2.3563000457621 | 1976 | 2.3511461141107 | 1975 | 2.3579701962316 | 1974 | 2.383391706654 | 1973 | 2.4139552835497 | 1972 | 2.428702811009 | 1971 | 2.4562679173785 | 1970 | 2.4894817324921 | 1969 | 2.5220982458939 | 1968 | 2.581561523551 | 1967 | 2.6592273897629 | 1966 | 2.745503923764 | 1965 | 2.8295996922774 | 1964 | 2.8948413025351 | 1963 | 2.9413164856626 | 1962 | 2.9678781781822 | 1961 | 3.0152600504724 |
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