72% (1987)

59% (1987)

62% (1969)

55% (1975)

25% (1990)

44% (1965)

70% (1980)

30% (1982)

60% (1991)

43% (1977)

58% (1979)

60% (1980)

58% (1978)

48% (1970)

50% (1956)

55% (1980)

50% (1979)

43% (1984)

42% (1972)

46% (1977)