Bi-annual	US dollars
1987-06-30	55
1987-12-31	40
1988-06-30	26
1988-12-31	18
1989-06-30	33
1989-12-31	8
1990-06-30	14
1990-12-31	19
1991-06-30	28
1991-12-31	28
1992-06-30	65
1992-12-31	94
1993-06-30	222
1993-12-31	330
1994-06-30	235
1994-12-31	316
1995-06-30	313
1995-12-31	464
1996-06-30	287
1996-12-31	315
1997-06-30	614
1997-12-31	630
1998-06-30	1072
1998-12-31	857
1999-06-30	904