68% (1981)

69% (1968)

46% (1969)

61% (1968)

67% (1983)

44% (1977)

72% (1973)

52% (1982)

70% (1972)

60% (1970)

57% (1975)

56% (1971)

70% (1979)

69% (1984)

90% (1971)

50% (1981)

70% (1968)

66% (1973)

75% (1977)

65% (1976)