35% (1979)

65% (1972)

55% (1975)

40% (1965)

50% (1967)

72% (1973)

60% (1965)

0% (1961)

65% (1974)

10% (1977)

72% (1970)

0% (1969)

70% (1973)

0% (1968)

0% (1972)

0% (1959)

0% (1964)

45% (1972)

0% (1953)

50% (1966)