69% (1970)

55% (1969)

50% (1972)

69% (1975)

10% (1972)

0% (1967)

60% (1974)

63% (1976)

77% (1965)

58% (1973)

54% (1978)

0% (1966)

0% (1965)

60% (1978)

56% (1969)

67% (1972)

47% (1970)

10% (1975)

69% (1972)

50% (1973)