49% (1979)

37% (1986)

100% (1981)

35% (1975)

23% (1968)

48% (1969)

33% (1990)

55% (1981)

20% (1987)

55% (1973)

32% (1978)

38% (1991)

50% (1976)

10% (1984)

36% (1970)

45% (1978)

20% (1971)

48% (1992)

35% (1988)

45% (1971)