45% (1972)

30% (1965)

56% (1964)

47% (1967)

51% (1965)

55% (1966)

45% (1966)

45% (1965)

57% (1968)

70% (1973)

63% (1972)

52% (1966)

18% (1967)

70% (1965)

60% (1965)

58% (1967)

35% (1986)

42% (1973)

64% (1965)

45% (1966)