18% (1990)

50% (1994)

60% (1993)

80% (1985)

70% (1991)

47% (1992)

0% (1992)

63% (1991)

45% (1992)

40% (1997)

0% (1992)

50% (1991)

0% (1990)

0% (1992)

0% (1991)