66% (1981)

64% (1981)

71% (1979)

51% (1990)

63% (1981)

77% (1979)

78% (1980)

62% (1990)

50% (1984)

63% (1980)

76% (1980)

56% (1979)

48% (1981)

66% (1981)

55% (1987)

67% (1980)

60% (1980)

54% (1979)

73% (1982)

52% (1981)