Bi-annual	US dollars
1987-06-30	63
1987-12-31	70
1988-06-30	44
1988-12-31	13
1989-06-30	12
1989-12-31	16
1990-06-30	16
1990-12-31	25
1991-06-30	28
1991-12-31	37
1992-06-30	29
1992-12-31	29
1993-06-30	68
1993-12-31	64
1994-06-30	48
1994-12-31	42
1995-06-30	62
1995-12-31	33
1996-06-30	26
1996-12-31	63
1997-06-30	35
1997-12-31	61
1998-06-30	247
1998-12-31	423
1999-06-30	374