67% (1999)

63% (2010)

65% (2000)

66% (1997)

67% (2009)

58% (2012)

64% (2008)

53% (1997)

58% (2000)

63% (1998)

58% (2003)

59% (2004)

57% (1997)

56% (2000)

57% (2008)

69% (1998)

77% (2010)

59% (2000)

69% (1999)

60% (2008)