56% (2009)

50% (1991)

60% (1957)

55% (1981)

50% (1975)

53% (2002)

0% (1970)

60% (1989)

62% (1983)

50% (1973)

0% (1961)

85% (1994)

67% (2001)

66% (1984)

60% (1950)

59% (2010)

79% (1984)

60% (1981)

50% (1981)

63% (2010)