53% (1972)

49% (1971)

57% (1970)

55% (1987)

52% (1977)

58% (1977)

71% (1967)

55% (1968)

68% (1973)

66% (1984)

50% (1969)

78% (1977)

0% (1981)

0% (1963)

30% (1980)

0% (1973)

43% (1986)

10% (1974)

0% (1970)

0% (1972)