57% (1975)

57% (1974)

44% (1973)

50% (1973)

56% (1973)

66% (1977)

52% (1975)

49% (1974)

70% (1974)

61% (1975)

46% (1975)

66% (1973)

40% (1982)

0% (1975)

38% (1977)

55% (1973)

60% (1974)

50% (1982)

0% (1967)

40% (1975)