35% (1977)

70% (1990)

56% (1990)

40% (1990)

60% (1978)

50% (1976)

67% (1965)

52% (1958)

70% (1962)

0% (1963)

0% (1978)

35% (1966)

0% (1988)

0% (1961)

50% (1967)

76% (1976)

50% (1991)

40% (1982)

20% (1978)

50% (1986)