56% (1992)

64% (1980)

46% (1986)

52% (1972)

54% (1988)

54% (1981)

66% (1972)

55% (1987)

53% (1980)

32% (1984)

57% (1983)

61% (1972)

54% (1986)

66% (1984)

47% (1978)

52% (1985)

58% (1981)

66% (1979)

58% (1984)

60% (1984)