42% (1985)

60% (1977)

0% (1970)

50% (1971)

50% (1981)

0% (1974)

0% (1980)

60% (1968)

50% (1979)

0% (1980)

37% (1959)

67% (1973)

60% (1985)

40% (1972)

50% (1980)

40% (1984)

20% (1987)

10% (1981)

0% (1975)

70% (1986)