68% (1998)

82% (1995)

64% (1994)

70% (1993)

57% (1996)

55% (1992)

64% (2003)

66% (1994)

65% (1996)

57% (1993)

59% (1997)

67% (1995)

61% (1998)

59% (1990)

96% (1996)

55% (1991)

57% (1993)

52% (1995)

68% (1993)

70% (1990)