67% (2007)

72% (2005)

0% (1961)

69% (1974)

74% (1983)

71% (1983)

79% (1993)

63% (2003)

85% (2005)

25% (2012)

69% (2013)

81% (1996)

56% (1978)

75% (2013)

70% (1997)

82% (2003)

76% (1997)

69% (1999)

87% (1999)

75% (1988)