53% (1982)

61% (1973)

63% (1982)

57% (1975)

62% (1974)

47% (1980)

52% (1969)

50% (1969)

48% (1979)

58% (1974)

69% (1975)

40% (1975)

45% (1969)

61% (1970)

60% (1973)

0% (1972)

0% (1978)

57% (1981)

20% (1972)

48% (1971)