56% (1972)

60% (1972)

65% (1986)

48% (1979)

51% (1976)

59% (1979)

52% (1979)

44% (1981)

52% (1971)

50% (1971)

22% (1984)

42% (1982)

49% (1968)

72% (1964)

60% (1969)

54% (1979)

59% (1981)

25% (1968)

60% (1982)

59% (1984)