Year | Value | 2022 | 64.175001350486 | 2021 | 64.648075007321 | 2020 | 65.10679421138 | 2019 | 65.555365942124 | 2018 | 65.994100802025 | 2017 | 66.421386557645 | 2016 | 66.837659364517 | 2015 | 67.244193993454 | 2014 | 67.64146586267 | 2013 | 68.029723954381 | 2012 | 68.409454074862 | 2011 | 68.780956931555 | 2010 | 69.144607299354 | 2009 | 69.506831431068 | 2008 | 69.866023890376 | 2007 | 70.225351642498 | 2006 | 70.581432572441 | 2005 | 70.931328764179 | 2004 | 71.278921451111 | 2003 | 71.623608387063 | 2002 | 71.960333866746 | 2001 | 72.297179136952 | 2000 | 72.575810122683 | 1999 | 72.814854976858 | 1998 | 73.048713970447 | 1997 | 73.285596549003 | 1996 | 73.523233330823 | 1995 | 73.759802548055 | 1994 | 73.991044159035 | 1993 | 74.218842430657 | 1992 | 74.440663789053 | 1991 | 74.663760476698 | 1990 | 74.920935325768 | 1989 | 75.189370109341 | 1988 | 75.456514199546 | 1987 | 75.728466938454 | 1986 | 75.998122727754 | 1985 | 76.264552098475 | 1984 | 76.523987525352 | 1983 | 76.779764514913 | 1982 | 77.036750857253 | 1981 | 77.300058468818 | 1980 | 77.695678641973 | 1979 | 78.14039662517 | 1978 | 78.565599173974 | 1977 | 78.97730153144 | 1976 | 79.379259860924 | 1975 | 79.771809561831 | 1974 | 80.15273029459 | 1973 | 80.499307735443 | 1972 | 80.824753825497 | 1971 | 81.153843230577 | 1970 | 81.404132749754 | 1969 | 81.614575669896 | 1968 | 81.818076357006 | 1967 | 82.017722998867 | 1966 | 82.214635266301 | 1965 | 82.4091265661 | 1964 | 82.601082676464 | 1963 | 82.792371773013 | 1962 | 82.981146895389 | 1961 | 83.168017079597 | 1960 | 83.30116522072 |
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