60% (1972)

60% (1979)

56% (1972)

60% (1969)

73% (1964)

0% (1967)

67% (1985)

53% (1979)

70% (1984)

52% (1982)

50% (1971)

44% (1981)

62% (1972)

64% (1985)

54% (1979)

52% (1980)

59% (1981)

65% (1986)

64% (1981)

48% (1979)