44% (1969)

51% (1976)

54% (1956)

32% (1959)

56% (1974)

38% (1957)

47% (1958)

41% (1969)

50% (1957)

50% (1960)

43% (1968)

50% (1967)

51% (1958)

0% (1962)

40% (1970)

42% (1959)

45% (1968)

56% (1971)

40% (1967)

62% (1976)