Bi-annual	US dollars
1987-06-30	113
1987-12-31	121
1988-06-30	29
1988-12-31	69
1989-06-30	33
1989-12-31	27
1990-06-30	21
1990-12-31	41
1991-06-30	45
1991-12-31	47
1992-06-30	40
1992-12-31	11
1993-06-30	11
1993-12-31	24
1994-06-30	22
1994-12-31	27
1995-06-30	16
1995-12-31	22
1996-06-30	30
1996-12-31	45
1997-06-30	43
1997-12-31	30
1998-06-30	63
1998-12-31	155
1999-06-30	151