Year | Value | 2022 | 132.46618106139 | 2021 | 124.27159209157 | 2020 | 120.81165452653 | 2019 | 119.79708636837 | 2018 | 117.89802289282 | 2017 | 115.68678459938 | 2016 | 113.47554630593 | 2015 | 112.04474505723 | 2014 | 110.37981269511 | 2013 | 107.70031217482 | 2012 | 105.12486992716 | 2011 | 103.30385015609 | 2010 | 100 | 2009 | 97.16441207076 | 2008 | 95.473465140479 | 2007 | 91.493236212279 | 2006 | 89.412070759625 | 2005 | 86.342351716962 | 2004 | 84.079084287201 | 2003 | 82.154006243496 | 2002 | 79.96878251821 | 2001 | 77.653485952133 | 2000 | 74.375650364204 | 1999 | 71.201873048907 | 1998 | 70.161290322581 | 1997 | 69.562955254943 | 1996 | 69.406867845994 | 1995 | 67.637877211238 | 1994 | 64.646201873049 | 1993 | 63.397502601457 | 1992 | 62.304890738814 | 1991 | 61.680541103018 | 1990 | 59.781477627471 | 1989 | 55.697190426639 | 1988 | 51.795005202914 | 1987 | 48.309053069719 | 1986 | 44.510926118626 | 1985 | 40.816857440167 | 1984 | 38.241415192508 | 1983 | 36.78459937565 | 1982 | 33.428720083247 | 1981 | 30.020811654527 | 1980 | 27.41935483871 | 1979 | 24.895941727367 | 1978 | 22.814776274714 | 1977 | 21.123829344433 | 1976 | 18.808532778356 | 1975 | 16.597294484912 | 1974 | 14.412070759625 | 1973 | 12.486992715921 | 1972 | 11.446409989594 | 1971 | 10.79604578564 | 1970 | 10.171696149844 | 1969 | 9.8335067637877 | 1968 | 9.5213319458897 | 1967 | 9.2872008324662 | 1966 | 8.9750260145682 | 1965 | 8.6888657648283 | 1964 | 8.4027055150884 | 1963 | 8.1685744016649 | 1962 | 8.1165452653486 | 1961 | 8.1425598335068 | 1960 | 7.9604578563996 |
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