70% (1974)

64% (1987)

55% (1983)

72% (1980)

72% (1981)

73% (1981)

71% (1977)

67% (1978)

77% (1975)

62% (1976)

61% (1974)

65% (1982)

76% (1986)

61% (1980)

10% (1998)

68% (1978)

60% (1981)

56% (1969)

64% (1982)

70% (1982)