50% (1985)

50% (1972)

61% (1971)

58% (1981)

72% (1971)

49% (1990)

39% (1977)

59% (1989)

57% (1990)

44% (1987)

62% (1972)

62% (1972)

52% (1983)

53% (1987)

67% (1981)

58% (1987)

60% (1972)

50% (1979)

60% (1992)

58% (1971)