59% (1992)

73% (1998)

84% (1999)

75% (2004)

76% (2011)

80% (2013)

56% (1981)

79% (2014)

80% (2016)

50% (2014)

68% (1978)

45% (2013)

30% (2008)

53% (2003)

30% (1958)

48% (2014)

72% (2015)

70% (1998)

64% (2005)

20% (2007)