69% (1972)

63% (1973)

45% (1985)

58% (1973)

55% (1971)

60% (1973)

42% (1974)

65% (1981)

66% (1974)

54% (1971)

40% (1973)

60% (1974)

57% (1972)

54% (1974)

53% (1972)

0% (1980)

49% (1974)

61% (1973)

53% (1973)

0% (1965)