56% (1972)

59% (1979)

61% (1972)

54% (1982)

49% (1979)

74% (1964)

37% (1984)

49% (1968)

70% (1976)

64% (1981)

59% (1971)

50% (1971)

55% (1964)

61% (1969)

47% (1976)

51% (1968)

54% (1979)

32% (1977)

50% (1970)

67% (1983)