54% (1973)

47% (1976)

67% (1975)

44% (1972)

45% (1978)

59% (1975)

37% (1973)

43% (1977)

40% (1976)

46% (1981)

46% (1974)

54% (1976)

64% (1977)

40% (1974)

0% (2015)

60% (1965)