71% (2001)

71% (2005)

65% (1988)

64% (2007)

50% (1971)

70% (1988)

69% (1970)

53% (2006)

61% (1994)

61% (2007)

63% (1977)

0% (1971)

63% (1997)

65% (1989)

50% (1940)

77% (1952)

0% (1999)

50% (1976)

40% (2011)

0% (1962)