37% (1967)

70% (1989)

56% (1964)

46% (1986)

50% (1988)

0% (1960)

0% (1972)

40% (1976)

55% (1988)

0% (1987)

55% (1974)

90% (1957)

65% (1978)

55% (1986)

60% (1987)

30% (1975)

70% (1968)

0% (1984)

57% (1970)

0% (1977)