66% (1977)

56% (1973)

61% (1975)

56% (1975)

44% (1973)

58% (1974)

47% (1975)

51% (1975)

70% (1974)

50% (1973)

50% (1971)

49% (1974)

66% (1973)

38% (1977)

46% (1978)

50% (1982)

40% (1982)

0% (1975)

42% (1976)

60% (1974)