53% (1969)

67% (1967)

56% (1969)

50% (1974)

49% (1981)

64% (1959)

32% (1981)

57% (1974)

51% (1966)

58% (1983)

40% (1974)

67% (1962)

56% (1966)

45% (1966)

58% (1963)

32% (1980)

40% (1965)

50% (1952)

50% (1964)

45% (1981)