64% (1994)

82% (1995)

63% (2003)

68% (1998)

68% (1994)

69% (1995)

69% (1993)

57% (1996)

65% (1996)

56% (1992)

59% (1997)

67% (1995)

57% (1993)

52% (1995)

52% (1991)

25% (1992)

100% (1990)

37% (1991)

57% (1990)

61% (1998)