80% (1978)

25% (1988)

0% (1997)

48% (1988)

45% (1977)

60% (1983)

80% (1993)

0% (1987)

50% (1982)

57% (1987)

60% (1983)

62% (1991)

58% (1992)

52% (1984)

0% (1990)

60% (1989)

50% (1999)

0% (1990)

0% (1978)

0% (1986)