35% (1985)

70% (1990)

46% (1990)

50% (1982)

83% (1989)

60% (1989)

0% (1965)

47% (1987)

60% (1961)

49% (1986)

0% (1976)

0% (1990)

58% (1969)

58% (1991)

10% (1980)

67% (1972)

0% (1970)

20% (1986)

40% (1961)

0% (1960)