73% (2007)

80% (2009)

62% (2012)

75% (2014)

67% (2010)

76% (2012)

64% (2012)

67% (2009)

71% (2011)

68% (2014)

73% (2001)

73% (1995)

65% (1997)

53% (2012)

65% (2011)

56% (2014)

60% (2008)

70% (2005)

66% (1997)

69% (2014)