Year | Value | 2022 | 80.974 | 2021 | 81.14 | 2020 | 81.287 | 2019 | 81.415 | 2018 | 81.524 | 2017 | 81.616 | 2016 | 81.689 | 2015 | 81.744 | 2014 | 81.782 | 2013 | 81.802 | 2012 | 81.804 | 2011 | 81.789 | 2010 | 81.774 | 2009 | 81.758 | 2008 | 81.743 | 2007 | 81.728 | 2006 | 81.712 | 2005 | 81.697 | 2004 | 81.681 | 2003 | 81.666 | 2002 | 81.651 | 2001 | 81.635 | 2000 | 81.62 | 1999 | 81.604 | 1998 | 81.589 | 1997 | 81.573 | 1996 | 81.558 | 1995 | 81.542 | 1994 | 81.527 | 1993 | 81.511 | 1992 | 81.496 | 1991 | 81.48 | 1990 | 81.465 | 1989 | 81.449 | 1988 | 81.434 | 1987 | 81.418 | 1986 | 81.403 | 1985 | 81.387 | 1984 | 81.371 | 1983 | 81.356 | 1982 | 81.34 | 1981 | 81.324 | 1980 | 81.393 | 1979 | 81.496 | 1978 | 81.599 | 1977 | 81.701 | 1976 | 81.802 | 1975 | 81.903 | 1974 | 82.004 | 1973 | 82.104 | 1972 | 82.204 | 1971 | 82.303 | 1970 | 82.402 | 1969 | 82.5 | 1968 | 82.598 | 1967 | 82.696 | 1966 | 82.793 | 1965 | 82.89 | 1964 | 82.986 | 1963 | 83.084 | 1962 | 83.247 | 1961 | 83.408 | 1960 | 83.569 |
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