80% (1996)

0% (1978)

62% (1986)

66% (1983)

50% (1987)

40% (1990)

0% (1978)

50% (1980)

35% (1986)

30% (1979)

61% (1991)

77% (1987)

0% (1988)

58% (1996)

41% (1975)

100% (1976)

65% (1994)

0% (1980)

60% (1985)

40% (1988)