Bi-annual	US dollars
1987-06-30	52
1987-12-31	26
1988-06-30	36
1988-12-31	16
1989-06-30	47
1989-12-31	23
1990-06-30	58
1990-12-31	8
1991-06-30	28
1991-12-31	22
1992-06-30	48
1992-12-31	35
1993-06-30	54
1993-12-31	12
1994-06-30	20
1994-12-31	27
1995-06-30	24
1995-12-31	68
1996-06-30	113
1996-12-31	115
1997-06-30	47
1997-12-31	69
1998-06-30	137
1998-12-31	100
1999-06-30	244