77% (1998)

0% (1975)

0% (1977)

14% (1983)

0% (1982)

43% (1990)

60% (1985)

60% (1984)

50% (1985)

45% (1983)

46% (1990)

52% (1985)

55% (1988)

42% (1988)

82% (1985)

0% (1988)

60% (2002)

63% (1998)

0% (1977)

80% (1985)