44% (1973)

55% (1973)

51% (1975)

50% (1973)

66% (1977)

57% (1975)

57% (1974)

61% (1975)

70% (1974)

66% (1973)

49% (1974)

42% (1976)

47% (1975)

50% (1971)

38% (1977)

55% (1973)

60% (1974)

50% (1982)

40% (1982)

0% (1975)