73% (1987)

59% (1987)

55% (1968)

58% (1978)

60% (1991)

62% (1969)

25% (1990)

50% (1982)

43% (1984)

43% (1977)

55% (1980)

30% (1982)

50% (1979)

55% (1975)

58% (1982)

58% (1978)

70% (1980)

44% (1965)

58% (1979)

42% (1970)