Year | Value | 2022 | 78.214 | 2021 | 77.696 | 2020 | 77.16 | 2019 | 76.607 | 2018 | 76.036 | 2017 | 75.447 | 2016 | 74.84 | 2015 | 74.213 | 2014 | 73.577 | 2013 | 72.93 | 2012 | 72.275 | 2011 | 71.609 | 2010 | 70.912 | 2009 | 70.075 | 2008 | 69.225 | 2007 | 68.36 | 2006 | 67.483 | 2005 | 66.594 | 2004 | 65.694 | 2003 | 64.78 | 2002 | 63.856 | 2001 | 62.922 | 2000 | 61.977 | 1999 | 60.742 | 1998 | 59.496 | 1997 | 58.237 | 1996 | 56.969 | 1995 | 55.688 | 1994 | 54.402 | 1993 | 53.109 | 1992 | 51.814 | 1991 | 50.576 | 1990 | 49.794 | 1989 | 49.012 | 1988 | 48.232 | 1987 | 47.45 | 1986 | 46.671 | 1985 | 45.893 | 1984 | 45.119 | 1983 | 44.345 | 1982 | 43.574 | 1981 | 42.807 | 1980 | 42.044 | 1979 | 41.158 | 1978 | 40.271 | 1977 | 39.391 | 1976 | 38.519 | 1975 | 37.652 | 1974 | 36.794 | 1973 | 35.944 | 1972 | 35.104 | 1971 | 34.271 | 1970 | 33.454 | 1969 | 32.729 | 1968 | 32.013 | 1967 | 31.304 | 1966 | 30.604 | 1965 | 29.913 | 1964 | 29.232 | 1963 | 28.558 | 1962 | 27.895 | 1961 | 27.241 | 1960 | 26.598 |
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