73% (1981)

37% (1969)

80% (1976)

60% (1984)

60% (1984)

72% (1989)

50% (1971)

69% (1985)

82% (1979)

73% (1968)

55% (1987)

73% (1966)

73% (1970)

71% (1967)

60% (1969)

77% (1976)

50% (1989)

60% (1972)

70% (1966)

45% (1982)