Year | Value | 2004 | 66.753505310511 | 2003 | 64.691667175857 | 2002 | 75.895505984299 | 2001 | 63.96854554024 | 2000 | 61.173102364469 | 1999 | 73.401737613557 | 1998 | 76.871242759752 | 1997 | 79.835349454772 | 1996 | 66.248818932403 | 1995 | 60.722822735564 | 1994 | 64.866886064047 | 1993 | 66.668036407717 | 1992 | 74.548898887047 | 1991 | 82.485577989794 | 1990 | 83.8762076588 | 1989 | 88.872840397938 | 1988 | 81.464310274124 | 1987 | 86.00007308272 | 1986 | 88.037946584769 | 1985 | 90.495441999281 | 1984 | 86.707063403799 | 1983 | 87.81796966161 | 1982 | 90.675737479991 | 1981 | 92.707583868665 | 1980 | 85.621450734734 | 1979 | 77.300007515619 | 1978 | 81.475849083931 | 1977 | 79.383904505198 | 1976 | 82.4128301696 | 1975 | 87.223767248866 | 1974 | 76.552890540937 | 1973 | 75.008199409643 | 1972 | 88.592952974321 | 1971 | 93.481689861644 | 1970 | 93.71964022907 | 1969 | 97.947987788699 | 1968 | 99.746075774221 | 1967 | 100.45638933662 | 1966 | 100.91664279576 | 1965 | 98.275301008786 | 1964 | 97.101980924431 | 1963 | 97.60551948052 | 1962 | 98.327615780446 | 1961 | 98.673376029277 |
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