78% (2008)

78% (2002)

66% (1999)

76% (2003)

66% (2001)

65% (2005)

69% (2007)

70% (2009)

69% (1997)

69% (2002)

52% (2005)

64% (2003)

57% (2001)

62% (2007)

70% (2009)

55% (2002)

60% (2003)

70% (1996)

75% (2008)

71% (2013)