42% (1972)

67% (1975)

59% (1975)

37% (1973)

54% (1973)

46% (1978)

42% (1977)

49% (1976)

54% (1976)

49% (1976)

64% (1977)

45% (1974)

45% (1974)

0% (2015)

60% (1965)