68% (1979)

30% (1985)

20% (1979)

70% (1961)

0% (1965)

50% (1960)

0% (1980)

70% (1976)

45% (1960)

0% (1986)

60% (1973)

47% (1971)

25% (1960)

64% (1964)

0% (1963)

60% (1979)

40% (1967)

80% (1975)

0% (1974)

47% (1975)