58% (1971)

62% (1971)

71% (1983)

76% (1985)

100% (1975)

67% (1970)

56% (1968)

70% (1976)

47% (1974)

53% (1971)

50% (1979)

60% (1978)

72% (1971)

51% (1971)

61% (1968)

63% (1981)

54% (1969)

66% (1968)

54% (1972)

63% (1971)