63% (1993)

66% (1997)

61% (1995)

70% (1993)

61% (2002)

59% (1996)

66% (2002)

73% (1995)

68% (2003)

63% (1995)

56% (2003)

68% (2001)

68% (2001)

60% (1996)

74% (1996)

50% (2000)

65% (1991)

69% (2000)

49% (2004)

63% (1993)