Year | Value | 2022 | 57.631703306298 | 2021 | 58.169947131701 | 2020 | 58.705583876302 | 2019 | 59.240717136286 | 2018 | 59.775454673658 | 2017 | 60.312803499605 | 2016 | 60.839096235472 | 2015 | 61.368680807855 | 2014 | 61.910932412646 | 2013 | 62.438126765794 | 2012 | 62.951468309729 | 2011 | 63.46298581275 | 2010 | 63.984819801432 | 2009 | 64.500371386126 | 2008 | 65.008290225949 | 2007 | 65.511393762745 | 2006 | 65.926840006912 | 2005 | 66.384311134392 | 2004 | 66.84432302206 | 2003 | 67.288340600085 | 2002 | 67.727340719999 | 2001 | 68.164168976014 | 2000 | 68.59049148718 | 1999 | 68.952447960089 | 1998 | 69.314794904711 | 1997 | 69.679454084839 | 1996 | 70.034215636561 | 1995 | 70.370647108188 | 1994 | 70.763887232987 | 1993 | 71.190217106262 | 1992 | 71.620613053933 | 1991 | 72.050017828405 | 1990 | 72.489131495167 | 1989 | 73.039749803332 | 1988 | 73.600414651686 | 1987 | 74.168441839855 | 1986 | 74.737539384817 | 1985 | 75.305582518402 | 1984 | 75.847517374638 | 1983 | 76.344454146552 | 1982 | 76.792078835586 | 1981 | 77.201230221278 | 1980 | 77.618275280904 | 1979 | 78.004805569688 | 1978 | 78.39912108739 | 1977 | 78.838609286203 | 1976 | 79.267587511678 | 1975 | 79.703610076749 | 1974 | 80.132792118764 | 1973 | 80.554576995425 | 1972 | 80.986747763105 | 1971 | 81.416963184331 | 1970 | 81.82799849132 | 1969 | 82.207038520397 | 1968 | 82.596724035638 | 1967 | 82.975898782599 | 1966 | 83.346089087753 | 1965 | 83.707207546657 | 1964 | 84.069591834423 | 1963 | 84.419746325853 | 1962 | 84.754881815833 | 1961 | 85.070037046064 | 1960 | 85.375783182276 |
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