67% (1985)

70% (1984)

59% (1984)

60% (1982)

50% (1978)

48% (1979)

50% (1968)

32% (1977)

42% (1982)

42% (1967)

20% (1980)

67% (1985)

52% (1971)

0% (1963)

56% (1985)

54% (1966)

10% (1971)

25% (1968)

62% (1982)