70% (1967)

75% (1973)

70% (1958)

62% (1956)

64% (1976)

53% (1974)

20% (1979)

69% (1963)

56% (1955)

59% (1958)

30% (1973)

55% (1969)

10% (1972)

62% (1971)

0% (1959)

70% (1960)

52% (1975)

60% (1963)

70% (1954)

54% (1958)