71% (2007)

70% (2009)

65% (1956)

78% (1964)

63% (2010)

66% (1989)

67% (1997)

46% (2009)

72% (1992)

0% (1988)

0% (1975)

71% (1986)

62% (2004)

64% (2003)

68% (1971)

70% (1986)

0% (1967)

0% (1967)

80% (1987)

68% (1954)