63% (2004)

63% (2006)

66% (1997)

71% (1999)

57% (1999)

63% (2001)

77% (2002)

66% (1991)

70% (1999)

61% (2003)

67% (1998)

40% (1997)

60% (2006)

64% (1998)

51% (2002)

69% (1999)

66% (1996)

72% (1998)

69% (2001)

65% (1993)