82% (1995)

68% (1998)

58% (1996)

69% (1993)

64% (1994)

65% (1996)

63% (2003)

69% (1995)

57% (1993)

59% (1997)

68% (1994)

56% (1992)

43% (1992)

61% (1998)

37% (1991)

68% (1993)

25% (1992)

52% (1991)

49% (1990)

80% (1990)