69% (1984)

47% (1995)

30% (1993)

0% (1982)

80% (1977)

70% (1984)

57% (1984)

68% (1990)

81% (1972)

71% (1985)

48% (1985)

55% (1986)

0% (1983)

0% (1976)

80% (1977)

10% (1989)

60% (1981)

27% (1977)

0% (1980)

0% (1976)