59% (1972)

77% (1973)

53% (1972)

62% (1971)

75% (1972)

58% (1972)

47% (1977)

65% (1976)

67% (1973)

64% (1972)

62% (1976)

41% (1972)

55% (1972)

60% (1972)

43% (1971)

73% (1973)

62% (1973)

70% (1972)

62% (1973)

51% (1973)