Year | Value | 2022 | 65.477824266515 | 2021 | 65.955955255107 | 2020 | 66.414592634795 | 2019 | 66.865659537169 | 2018 | 67.311930161632 | 2017 | 67.743486343743 | 2016 | 68.161764916403 | 2015 | 68.560075251248 | 2014 | 68.918338698579 | 2013 | 69.172332056544 | 2012 | 69.408201342988 | 2011 | 69.664461267794 | 2010 | 69.959348445188 | 2009 | 70.312755855383 | 2008 | 70.647277142363 | 2007 | 71.003531085145 | 2006 | 71.245831482403 | 2005 | 71.540505192914 | 2004 | 71.809770548468 | 2003 | 72.049656236737 | 2002 | 72.273242252964 | 2001 | 72.511701075157 | 2000 | 72.767714257195 | 1999 | 73.017408029148 | 1998 | 73.258267702029 | 1997 | 73.501174905968 | 1996 | 73.72245565714 | 1995 | 73.909777624447 | 1994 | 74.202901796742 | 1993 | 74.537830376898 | 1992 | 74.869775062973 | 1991 | 75.182281571745 | 1990 | 75.494526641836 | 1989 | 75.86655064263 | 1988 | 76.262604323361 | 1987 | 76.679012925742 | 1986 | 77.100572007533 | 1985 | 77.531605065809 | 1984 | 77.960031998776 | 1983 | 78.351027267388 | 1982 | 78.68069903805 | 1981 | 78.971248740231 | 1980 | 79.289408316004 | 1979 | 79.597551127903 | 1978 | 79.870178553469 | 1977 | 80.139975399986 | 1976 | 80.403036078975 | 1975 | 80.656896692595 | 1974 | 80.958467101814 | 1973 | 81.265490000953 | 1972 | 81.615366187796 | 1971 | 81.977075833071 | 1970 | 82.323834886978 | 1969 | 82.870740027208 | 1968 | 83.425246294392 | 1967 | 83.916682790807 | 1966 | 84.336070609049 | 1965 | 84.737207296257 | 1964 | 85.122843859385 | 1963 | 85.498632004564 | 1962 | 85.86399433872 | 1961 | 86.211081301727 | 1960 | 86.550279091526 |
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