73% (2008)

64% (1996)

77% (2010)

45% (1975)

70% (1976)

67% (1977)

67% (2011)

69% (1988)

50% (1986)

50% (1986)

55% (1974)

64% (1980)

50% (1997)

0% (1979)

57% (1985)

62% (1990)

70% (1978)

80% (1982)

50% (1998)

0% (1977)