Bi-annual	US dollars
1987-06-30	210
1987-12-31	128
1988-06-30	217
1988-12-31	67
1989-06-30	119
1989-12-31	81
1990-06-30	171
1990-12-31	390
1991-06-30	467
1991-12-31	501
1992-06-30	588
1992-12-31	429
1993-06-30	1241
1993-12-31	1369
1994-06-30	1991
1994-12-31	8267
1995-06-30	7941
1995-12-31	8115
1996-06-30	8926
1996-12-31	11724
1997-06-30	10216
1997-12-31	10533
1998-06-30	13172
1998-12-31	10250
1999-06-30	9201