72% (1962)

86% (1968)

60% (1974)

57% (1969)

46% (1950)

56% (1965)

46% (1967)

50% (1963)

65% (1967)

55% (1965)

50% (1973)

50% (1970)

60% (1958)

0% (1969)

60% (1965)

59% (1964)

55% (1970)

82% (1967)

75% (1961)

20% (1973)