79% (2016)

69% (1992)

55% (2015)

56% (2014)

69% (2015)

53% (2014)

58% (2005)

54% (2010)

50% (2014)

65% (2017)

61% (2007)

67% (2016)

66% (2015)

58% (2013)

42% (2014)

49% (2007)

67% (2013)

62% (2009)

66% (2013)

44% (1986)