69% (1975)

56% (1969)

0% (1967)

69% (1970)

60% (1974)

60% (1978)

69% (1972)

47% (1970)

50% (1972)

0% (1975)

63% (1976)

0% (1966)

55% (1969)

10% (1972)

0% (1967)

0% (1977)

54% (1978)

67% (1972)

50% (1968)

0% (1974)