63% (1975)

72% (1972)

61% (1976)

63% (1980)

65% (1972)

62% (1976)

53% (1972)

53% (1979)

62% (1979)

59% (1977)

72% (1978)

58% (1978)

69% (1975)

0% (1977)

56% (1977)

65% (1978)

58% (1972)

48% (2017)

61% (1974)

47% (1978)