71% (2002)

72% (2002)

69% (1997)

60% (2002)

71% (2007)

67% (1999)

71% (2005)

65% (2006)

69% (2010)

57% (2007)

60% (2005)

66% (2001)

63% (2006)

65% (2008)

66% (2001)

52% (2001)

68% (2004)

66% (2000)

68% (2002)

55% (2007)