Bi-annual	US dollars
1987-06-30	3
1987-12-31	9
1988-06-30	10
1988-12-31	5
1989-06-30	2
1989-12-31	6
1990-06-30	0
1990-12-31	0
1991-06-30	3
1991-12-31	11
1992-06-30	34
1992-12-31	68
1993-06-30	120
1993-12-31	191
1994-06-30	318
1994-12-31	347
1995-06-30	437
1995-12-31	357
1996-06-30	513
1996-12-31	856
1997-06-30	627
1997-12-31	1186
1998-06-30	1167
1998-12-31	1301
1999-06-30	1488