60% (2009)

57% (1973)

48% (1991)

50% (1985)

0% (1986)

63% (2013)

65% (1978)

84% (1968)

60% (1983)

60% (1965)

81% (1977)

60% (1984)

58% (1980)

72% (2006)

50% (1967)

74% (1965)

60% (2005)

0% (2007)

58% (1978)

52% (1971)