82% (1995)

68% (1998)

64% (1994)

70% (1993)

67% (1996)

57% (1996)

64% (2003)

59% (1997)

67% (1994)

55% (1992)

57% (1993)

37% (1991)

52% (1995)

62% (1998)

57% (1990)

30% (1993)

96% (1996)

55% (1991)

68% (1993)

80% (1990)