76% (2008)

69% (1978)

67% (1975)

78% (2010)

72% (2014)

70% (1974)

22% (2011)

75% (1971)

60% (1985)

58% (1999)

47% (2014)

0% (1973)

55% (1971)

68% (1984)

85% (2003)

72% (2015)

68% (1997)

0% (2017)

77% (2009)

65% (1967)