60% (1978)

64% (1985)

59% (1975)

69% (1972)

50% (1978)

70% (1971)

60% (1976)

44% (1978)

60% (1977)

0% (1968)

20% (1979)

40% (1977)

0% (1969)

0% (1971)

80% (1981)

80% (1992)

80% (2006)