54% (1967)

37% (1982)

52% (1976)

60% (1977)

61% (1982)

0% (1985)

70% (1975)

50% (1974)

0% (1982)

0% (1960)

66% (1968)

45% (1985)

45% (1981)

69% (1975)

20% (1981)

60% (1988)

37% (1977)

55% (1984)

40% (1982)

0% (1976)