Bi-annual	US dollars
1987-06-30	710
1987-12-31	545
1988-06-30	471
1988-12-31	521
1989-06-30	36
1989-12-31	160
1990-06-30	169
1990-12-31	39
1991-06-30	26
1991-12-31	45
1992-06-30	952
1992-12-31	974
1993-06-30	1439
1993-12-31	1230
1994-06-30	1128
1994-12-31	179
1995-06-30	660
1995-12-31	1700
1996-06-30	191
1996-12-31	296
1997-06-30	655
1997-12-31	334
1998-06-30	43
1998-12-31	88
1999-06-30	88