55% (1969)

49% (1981)

64% (1959)

67% (1967)

50% (1974)

65% (1969)

56% (1966)

47% (1959)

58% (1983)

56% (1969)

45% (1981)

70% (1955)

32% (1980)

50% (1964)

62% (1981)

59% (1959)

32% (1981)

50% (1958)

57% (1974)

51% (1966)