56% (1961)

62% (1968)

62% (1959)

65% (1982)

50% (1969)

53% (1969)

53% (1964)

47% (1974)

56% (1967)

50% (1957)

56% (1965)

10% (1974)

73% (1968)

0% (1976)

54% (1965)

50% (1982)

44% (1979)

60% (1960)

35% (1975)

33% (1985)