33% (1975)

60% (1966)

54% (1962)

44% (1984)

58% (1975)

42% (1972)

35% (1966)

45% (1976)

58% (1978)

33% (1964)

46% (1964)

57% (1964)

64% (1965)

18% (1972)

60% (1968)

48% (1976)

5% (1981)

60% (1970)

70% (1966)

58% (1968)