Year | Value | 2022 | 63.799 | 2021 | 62.969 | 2020 | 62.112 | 2019 | 61.229 | 2018 | 60.319 | 2017 | 59.383 | 2016 | 58.421 | 2015 | 57.434 | 2014 | 56.423 | 2013 | 55.387 | 2012 | 54.33 | 2011 | 53.247 | 2010 | 52.163 | 2009 | 51.076 | 2008 | 49.991 | 2007 | 48.902 | 2006 | 47.815 | 2005 | 46.731 | 2004 | 45.651 | 2003 | 44.573 | 2002 | 43.501 | 2001 | 42.435 | 2000 | 41.741 | 1999 | 41.169 | 1998 | 40.601 | 1997 | 40.035 | 1996 | 39.473 | 1995 | 38.911 | 1994 | 38.354 | 1993 | 37.799 | 1992 | 37.249 | 1991 | 36.7 | 1990 | 36.428 | 1989 | 36.158 | 1988 | 35.888 | 1987 | 35.619 | 1986 | 35.35 | 1985 | 35.083 | 1984 | 34.817 | 1983 | 34.552 | 1982 | 34.287 | 1981 | 34.024 | 1980 | 33.762 | 1979 | 33.5 | 1978 | 33.302 | 1977 | 33.105 | 1976 | 32.908 | 1975 | 32.712 | 1974 | 32.516 | 1973 | 32.321 | 1972 | 32.127 | 1971 | 31.933 | 1970 | 31.74 | 1969 | 31.548 | 1968 | 31.446 | 1967 | 31.374 | 1966 | 31.302 | 1965 | 31.23 | 1964 | 31.158 | 1963 | 31.086 | 1962 | 31.015 | 1961 | 30.943 | 1960 | 30.705 |
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