61% (1971)

57% (1971)

76% (1985)

61% (1968)

71% (1983)

48% (1970)

62% (1967)

53% (1971)

54% (1969)

50% (1980)

63% (1971)

63% (1981)

57% (1972)

72% (1971)

57% (1982)

67% (1970)

56% (1968)

60% (1978)

70% (1976)

51% (1971)