Year | Value | 2022 | 74.377 | 2021 | 74.214 | 2020 | 74.061 | 2019 | 73.921 | 2018 | 73.792 | 2017 | 73.675 | 2016 | 73.57 | 2015 | 73.477 | 2014 | 73.384 | 2013 | 73.29 | 2012 | 73.197 | 2011 | 73.185 | 2010 | 73.255 | 2009 | 73.324 | 2008 | 73.394 | 2007 | 73.463 | 2006 | 73.533 | 2005 | 73.602 | 2004 | 73.671 | 2003 | 73.74 | 2002 | 73.809 | 2001 | 73.877 | 2000 | 73.988 | 1999 | 74.12 | 1998 | 74.251 | 1997 | 74.382 | 1996 | 74.513 | 1995 | 74.643 | 1994 | 74.772 | 1993 | 74.901 | 1992 | 75.03 | 1991 | 75.158 | 1990 | 75.22 | 1989 | 75.249 | 1988 | 75.278 | 1987 | 75.307 | 1986 | 75.336 | 1985 | 75.365 | 1984 | 75.394 | 1983 | 75.423 | 1982 | 75.452 | 1981 | 75.481 | 1980 | 75.167 | 1979 | 74.167 | 1978 | 73.142 | 1977 | 72.092 | 1976 | 71.018 | 1975 | 69.917 | 1974 | 68.794 | 1973 | 67.649 | 1972 | 66.484 | 1971 | 65.295 | 1970 | 64.402 | 1969 | 63.93 | 1968 | 63.456 | 1967 | 62.978 | 1966 | 62.498 | 1965 | 62.016 | 1964 | 61.532 | 1963 | 61.044 | 1962 | 60.555 | 1961 | 60.063 | 1960 | 59.548 |
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