77% (1986)

78% (2007)

76% (2015)

85% (2009)

74% (2015)

70% (2013)

58% (2014)

72% (2003)

0% (2008)

40% (2013)

45% (2012)

74% (2007)

72% (2012)

66% (2014)

60% (2016)

30% (2010)

40% (2015)

73% (2009)

58% (2015)

55% (2008)