Bi-annual	US dollars
1987-06-30	8
1987-12-31	9
1988-06-30	5
1988-12-31	14
1989-06-30	28
1989-12-31	45
1990-06-30	92
1990-12-31	77
1991-06-30	105
1991-12-31	155
1992-06-30	148
1992-12-31	117
1993-06-30	626
1993-12-31	767
1994-06-30	918
1994-12-31	1056
1995-06-30	1304
1995-12-31	1487
1996-06-30	1652
1996-12-31	2039
1997-06-30	2109
1997-12-31	2206
1998-06-30	2556
1998-12-31	1885
1999-06-30	1064