63% (2008)

70% (1996)

73% (2002)

76% (2003)

65% (2005)

67% (2006)

61% (2000)

76% (2001)

69% (2001)

58% (2008)

70% (2003)

68% (2002)

62% (2005)

53% (2006)

56% (2004)

65% (1998)