73% (2008)

63% (1996)

67% (1977)

67% (2011)

45% (2008)

45% (1975)

64% (1980)

57% (1985)

50% (1998)

40% (1962)

71% (1988)

62% (1990)

60% (1976)

50% (1986)

80% (1982)

50% (1983)

77% (2010)

0% (1983)

0% (1978)

0% (1981)