59% (2005)

61% (2011)

59% (2009)

63% (2016)

45% (2018)

64% (2010)

64% (2015)

55% (2005)

61% (2016)

58% (1998)

62% (2009)

65% (2006)

74% (2008)

55% (2012)

69% (2016)

67% (2009)

62% (2011)

60% (2006)

61% (2009)

50% (2008)