54% (1973)

67% (1975)

59% (1975)

42% (1972)

64% (1977)

37% (1973)

47% (1978)

45% (1974)

49% (1976)

53% (1976)

41% (1977)

49% (1976)

45% (1974)

0% (2015)

60% (1965)