61% (2002)

45% (1981)

71% (1985)

41% (1987)

53% (1985)

58% (1986)

63% (1983)

56% (1983)

74% (1986)

54% (1983)

75% (1988)

70% (1984)

60% (1984)

50% (1984)

55% (1986)

63% (1987)

40% (1985)

37% (1983)

50% (1983)

75% (1985)