70% (1994)

30% (1986)

95% (1979)

53% (1987)

40% (1978)

0% (1987)

62% (1988)

61% (1987)

0% (1979)

45% (1986)

0% (1981)

56% (1978)

20% (1977)

48% (1997)

40% (1976)

35% (1982)

57% (1986)

34% (1986)

40% (1980)

66% (1980)