78% (1964)

70% (2007)

70% (2009)

40% (1968)

65% (1956)

63% (2010)

62% (2004)

66% (1989)

45% (2009)

60% (1961)

67% (1997)

0% (1956)

72% (1992)

0% (1967)

80% (1994)

71% (1986)

70% (1986)

50% (1956)

53% (1983)

65% (1985)