10% (1968)

56% (1969)

40% (1970)

62% (1971)

60% (1970)

50% (1969)

40% (1967)

0% (1968)

40% (1969)

0% (1959)

60% (1968)

0% (1972)

0% (1968)

40% (1969)

0% (1967)