Bi-annual	US dollars
1987-06-30	361
1987-12-31	270
1988-06-30	220
1988-12-31	246
1989-06-30	135
1989-12-31	211
1990-06-30	439
1990-12-31	480
1991-06-30	509
1991-12-31	579
1992-06-30	598
1992-12-31	514
1993-06-30	1469
1993-12-31	1358
1994-06-30	1606
1994-12-31	7582
1995-06-30	7154
1995-12-31	6756
1996-06-30	7372
1996-12-31	6920
1997-06-30	9832
1997-12-31	10280
1998-06-30	12256
1998-12-31	8541
1999-06-30	8020