72% (1971)

80% (1968)

65% (1966)

60% (1969)

60% (1974)

0% (1969)

35% (1971)

60% (1972)

61% (1971)

20% (1973)

40% (1972)

56% (1972)

0% (1974)

35% (1969)

60% (1971)

0% (1970)

0% (1971)

50% (1973)

55% (1974)

60% (1969)