78% (2017)

77% (2016)

66% (2016)

71% (2005)

76% (2014)

69% (2006)

60% (2006)

67% (1998)

68% (1999)

64% (2006)

60% (2009)

75% (2008)

57% (2003)

59% (2001)

57% (2008)

64% (2013)

63% (2009)

0% (1970)

70% (2000)

74% (2011)