60% (1982)

80% (1980)

43% (1984)

55% (1978)

48% (1987)

47% (1978)

71% (1981)

63% (1982)

50% (1981)

58% (1982)

55% (1987)

62% (1980)

61% (1977)

38% (1991)

73% (1975)

60% (1980)

55% (1990)

64% (1989)

53% (1982)

60% (1988)