0% (1974)

62% (1984)

68% (1989)

66% (1986)

73% (1975)

0% (1986)

72% (1983)

70% (1986)

75% (1984)

65% (1980)

69% (1980)

72% (1981)

74% (1974)

50% (1981)

55% (1981)

0% (1987)

66% (1987)

49% (1988)

37% (1979)

45% (1974)