73% (2008)

63% (1996)

67% (2011)

71% (1988)

45% (2008)

67% (1977)

45% (1975)

60% (1976)

0% (1981)

50% (1974)

0% (1979)

50% (1986)

80% (1982)

64% (1980)

0% (1984)

50% (1997)

57% (1985)

40% (1962)

77% (2010)

50% (1998)