Year | Value | 2022 | 78.52 | 2021 | 78.162 | 2020 | 77.794 | 2019 | 77.417 | 2018 | 77.031 | 2017 | 76.634 | 2016 | 76.228 | 2015 | 75.811 | 2014 | 75.384 | 2013 | 74.946 | 2012 | 74.498 | 2011 | 74.038 | 2010 | 73.568 | 2009 | 73.093 | 2008 | 72.613 | 2007 | 72.126 | 2006 | 71.635 | 2005 | 71.138 | 2004 | 70.637 | 2003 | 70.13 | 2002 | 69.618 | 2001 | 69.101 | 2000 | 68.58 | 1999 | 68.053 | 1998 | 67.712 | 1997 | 67.385 | 1996 | 67.058 | 1995 | 66.727 | 1994 | 66.396 | 1993 | 66.063 | 1992 | 65.728 | 1991 | 65.392 | 1990 | 65.054 | 1989 | 64.714 | 1988 | 64.224 | 1987 | 63.47 | 1986 | 62.711 | 1985 | 61.945 | 1984 | 61.175 | 1983 | 60.396 | 1982 | 59.614 | 1981 | 58.826 | 1980 | 58.298 | 1979 | 58.769 | 1978 | 59.237 | 1977 | 59.704 | 1976 | 60.168 | 1975 | 60.632 | 1974 | 61.093 | 1973 | 61.212 | 1972 | 58.685 | 1971 | 56.103 | 1970 | 53.492 | 1969 | 50.861 | 1968 | 48.229 | 1967 | 45.6 | 1966 | 44.126 | 1965 | 42.663 | 1964 | 41.214 | 1963 | 39.776 | 1962 | 38.358 | 1961 | 36.959 | 1960 | 35.584 |
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