50% (1987)

80% (1991)

45% (1975)

25% (1961)

50% (1975)

64% (1966)

0% (1963)

27% (1979)

0% (1980)

0% (1961)

55% (1983)

0% (1968)

45% (1972)

70% (1962)

50% (1961)

30% (1969)

50% (1981)

70% (1969)

90% (1959)

52% (1967)