Bi-annual	US dollars
1987-06-30	47
1987-12-31	42
1988-06-30	29
1988-12-31	27
1989-06-30	31
1989-12-31	42
1990-06-30	23
1990-12-31	15
1991-06-30	31
1991-12-31	30
1992-06-30	34
1992-12-31	23
1993-06-30	41
1993-12-31	28
1994-06-30	113
1994-12-31	39
1995-06-30	84
1995-12-31	112
1996-06-30	190
1996-12-31	281
1997-06-30	454
1997-12-31	191
1998-06-30	153
1998-12-31	42
1999-06-30	319