53% (1972)

74% (1972)

49% (1977)

63% (1971)

59% (1972)

40% (1971)

55% (1972)

62% (1971)

76% (1973)

73% (1973)

67% (1973)

70% (1972)

59% (1972)

61% (1976)

64% (1972)

42% (1972)

62% (1973)

51% (1973)

62% (1973)

60% (1972)