71% (1979)

59% (1975)

58% (1985)

57% (1983)

70% (1977)

72% (1978)

68% (1975)

63% (1979)

37% (1976)

60% (1982)

50% (1981)

55% (1981)

85% (1984)

10% (1982)

60% (1982)

60% (1976)

70% (1992)

10% (1983)

10% (1983)

10% (1980)