72% (1992)

71% (1991)

60% (2004)

65% (2003)

74% (1996)

54% (2004)

59% (1991)

72% (1993)

58% (1996)

55% (1998)

69% (1996)

73% (2004)

66% (2000)

65% (1994)

61% (2001)

63% (2000)

76% (1994)

57% (1994)

63% (1994)

59% (1994)