57% (1953)

50% (1969)

65% (1960)

20% (1978)

59% (1974)

0% (1980)

50% (1953)

0% (1989)

60% (1961)

90% (1990)

55% (1984)

50% (1985)

72% (1972)

0% (1980)

42% (1979)

0% (1962)

0% (1969)

50% (1954)

0% (1980)

53% (1984)