67% (1971)

48% (1969)

70% (1970)

63% (1973)

46% (1974)

63% (1969)

59% (1971)

40% (1970)

0% (1968)

45% (1972)

20% (1974)

0% (1970)

0% (1973)

20% (1975)

0% (1972)