67% (2009)

69% (2012)

73% (1999)

71% (2005)

66% (2009)

73% (2006)

65% (2008)

72% (2006)

64% (2011)

70% (2004)

75% (1999)

62% (2013)

70% (2007)

68% (2004)

61% (2016)

60% (2001)

62% (2012)

71% (2016)

68% (1998)

68% (2001)