63% (2004)

63% (2006)

71% (1999)

66% (1997)

77% (2002)

61% (2003)

57% (1999)

70% (1999)

63% (2001)

65% (1993)

51% (2002)

66% (1991)

65% (1997)

72% (1998)

67% (1998)

69% (1999)

64% (1998)

69% (1989)

69% (2001)

0% (1997)