78% (1982)

79% (1972)

76% (1968)

76% (1969)

81% (1974)

63% (1971)

69% (1984)

72% (1976)

69% (1969)

68% (1984)

70% (1970)

53% (1977)

55% (1981)

90% (1974)

61% (1986)

60% (2001)

65% (1979)

0% (1979)

71% (1976)

0% (1987)