59% (1975)

67% (1975)

38% (1973)

54% (1973)

42% (1972)

46% (1978)

64% (1977)

49% (1976)

45% (1974)

41% (1977)

53% (1976)

49% (1976)

45% (1974)

0% (2015)

60% (1965)