56% (1981)

38% (1972)

77% (1979)

37% (2001)

80% (1997)

68% (2009)

61% (1985)

45% (2015)

56% (2001)

60% (1989)

88% (1996)

71% (2010)

79% (2006)

77% (2002)

50% (1983)

20% (2009)

0% (2012)

76% (2013)

83% (2013)

70% (1994)