61% (1971)

68% (1983)

64% (1973)

60% (1973)

0% (1975)

68% (1972)

63% (1975)

63% (1972)

66% (1973)

72% (1982)

62% (1973)

69% (1975)

60% (1972)

41% (1978)

67% (1973)

55% (1972)

50% (1977)

57% (1980)

70% (1974)

62% (1984)