38% (1977)

32% (1968)

46% (1969)

33% (1973)

48% (1970)

47% (1969)

48% (1978)

53% (1962)

60% (1964)

0% (1976)

77% (1981)

29% (1985)

40% (1971)

20% (1972)

50% (1973)

20% (1962)

32% (1966)

40% (1975)

50% (1982)

39% (1965)