65% (2000)

59% (2005)

65% (2003)

64% (1998)

69% (2002)

65% (2005)

55% (2007)

67% (2000)

66% (1999)

62% (2006)

64% (2007)

65% (2004)

60% (2004)

63% (2005)

60% (2003)

57% (2006)

63% (2011)

61% (2008)

56% (2006)

65% (2007)