69% (1984)

71% (1985)

81% (1972)

0% (1982)

10% (1989)

0% (1975)

80% (1977)

55% (1988)

71% (1968)

57% (1984)

30% (1993)

80% (1977)

0% (1986)

67% (1980)

70% (1986)

80% (1985)

63% (1983)

68% (1990)

65% (1987)

90% (1981)