80% (1982)

76% (1978)

64% (1986)

69% (1980)

56% (1976)

68% (1966)

70% (1994)

61% (1983)

68% (1967)

73% (1974)

66% (1969)

69% (1982)

52% (1977)

67% (1978)

68% (1972)

63% (1976)

70% (1984)

64% (1978)

64% (1985)

63% (1968)