67% (1990)

61% (1989)

53% (1988)

58% (1990)

63% (1993)

55% (1987)

59% (1988)

55% (1987)

33% (1988)

52% (1987)

68% (1988)

76% (1984)

64% (1991)

48% (1987)

52% (1986)

64% (1994)

45% (1989)

45% (1987)

53% (1987)

40% (1989)