56% (1982)

80% (1980)

51% (1987)

54% (1978)

83% (1981)

73% (1980)

71% (1977)

62% (1977)

60% (1980)

56% (1975)

57% (1982)

68% (1984)

61% (1980)

68% (1981)

50% (1981)

47% (1978)

64% (1989)

53% (1982)

69% (1984)

68% (1981)