Year | Value | 2022 | 61.987876103786 | 2021 | 62.484205675374 | 2020 | 62.970619147304 | 2019 | 63.449240652108 | 2018 | 63.921042204976 | 2017 | 64.387067514831 | 2016 | 64.849921246423 | 2015 | 65.312767645301 | 2014 | 65.766879252977 | 2013 | 66.207787948524 | 2012 | 66.640706859788 | 2011 | 67.067989601236 | 2010 | 67.512581347269 | 2009 | 67.954665074761 | 2008 | 68.3880890619 | 2007 | 68.82474474442 | 2006 | 69.146089027821 | 2005 | 69.525085385879 | 2004 | 69.897913716549 | 2003 | 70.248331352362 | 2002 | 70.592334175205 | 2001 | 70.932350971654 | 2000 | 71.28269636752 | 1999 | 71.59557381296 | 1998 | 71.896529353848 | 1997 | 72.197638521105 | 1996 | 72.484150826319 | 1995 | 72.743849173187 | 1994 | 73.08154666239 | 1993 | 73.449896473872 | 1992 | 73.80871263522 | 1991 | 74.178536158072 | 1990 | 74.559060731845 | 1989 | 74.993471115596 | 1988 | 75.441596465715 | 1987 | 75.925919382971 | 1986 | 76.426755019721 | 1985 | 76.940659500768 | 1984 | 77.454319820854 | 1983 | 77.926172433553 | 1982 | 78.350729549452 | 1981 | 78.738523752621 | 1980 | 79.148461973571 | 1979 | 79.573999484303 | 1978 | 79.978848952057 | 1977 | 80.445573971229 | 1976 | 80.895511497699 | 1975 | 81.345918715941 | 1974 | 81.788980887032 | 1973 | 82.223651960265 | 1972 | 82.67482086147 | 1971 | 83.12265737659 | 1970 | 83.561275751371 | 1969 | 83.992514683742 | 1968 | 84.440514362411 | 1967 | 84.873371465657 | 1966 | 85.294055342083 | 1965 | 85.701171823372 | 1964 | 86.112640975346 | 1963 | 86.510039794656 | 1962 | 86.884690418085 | 1961 | 87.241365054655 | 1960 | 87.588611878301 |
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