66% (1981)

64% (1981)

51% (1990)

71% (1979)

63% (1981)

50% (1984)

77% (1979)

63% (1980)

76% (1980)

78% (1980)

48% (1981)

56% (1979)

62% (1990)

73% (1982)

66% (1981)

54% (1979)

67% (1980)

48% (1989)

52% (1981)

67% (1981)