67% (1983)

68% (1972)

59% (1971)

73% (1982)

68% (1972)

60% (1972)

57% (1980)

62% (1979)

67% (1973)

53% (1977)

66% (1973)

63% (1972)

50% (1977)

53% (1973)

50% (1977)

47% (1979)

48% (1980)

62% (1984)

60% (1976)

62% (1980)