50% (1961)

50% (1960)

56% (1965)

45% (1969)

50% (1960)

58% (1972)

30% (1987)

50% (1992)

56% (1978)

57% (1964)

60% (1968)

35% (1960)

58% (1955)

63% (1969)

49% (1983)

57% (1962)

60% (1958)

20% (1980)

52% (1959)

55% (1965)