61% (1975)

55% (1973)

50% (1973)

44% (1973)

57% (1975)

46% (1975)

51% (1975)

40% (1982)

66% (1973)

57% (1974)

66% (1977)

49% (1974)

55% (1973)

38% (1977)

50% (1982)

70% (1974)

0% (1975)

42% (1976)

60% (1975)

50% (1971)