47% (1962)

50% (1965)

53% (1970)

55% (1964)

55% (1960)

50% (1953)

80% (1967)

48% (1968)

50% (1961)

55% (1961)

50% (1969)

55% (1952)

40% (1973)

64% (1954)

50% (1957)

50% (1994)

53% (1953)