54% (1995)

48% (1991)

45% (1993)

50% (1998)

10% (1992)

58% (1995)

64% (1994)

56% (1990)

67% (1992)

52% (1989)

63% (1998)

70% (1986)

72% (1998)

69% (1997)

65% (1989)

68% (1988)

50% (1993)

61% (1989)

0% (1995)

62% (1992)