59% (1982)

80% (1980)

55% (1978)

20% (1985)

58% (1982)

82% (1981)

67% (1976)

73% (1975)

71% (1981)

38% (1991)

55% (1987)

62% (1980)

53% (1987)

58% (1987)

69% (1984)

58% (1981)

64% (1989)

75% (1983)

60% (1980)

60% (1980)