60% (1991)

64% (1977)

51% (1965)

43% (1979)

50% (1989)

55% (1972)

52% (1984)

35% (1981)

59% (1981)

38% (1985)

62% (1979)

65% (1969)

30% (1991)

61% (1969)

53% (1981)

70% (1986)

43% (1962)

68% (1990)

74% (1978)

72% (1984)