73% (1987)

59% (1987)

62% (1969)

55% (1975)

50% (1982)

25% (1990)

58% (1979)

58% (1978)

58% (1982)

58% (1978)

48% (1976)

43% (1977)

60% (1980)

30% (1984)

43% (1984)

30% (1982)

55% (1968)

42% (1972)

50% (1979)

42% (1970)