78% (1964)

70% (2007)

70% (2009)

40% (1968)

62% (2004)

65% (1956)

53% (1983)

67% (1997)

72% (1993)

0% (1990)

0% (1956)

68% (1954)

63% (2010)

64% (2003)

45% (2009)

60% (1961)

70% (1986)

66% (1989)

0% (1991)

70% (1987)