Bi-annual	US dollars
1987-06-30	927
1987-12-31	1110
1988-06-30	691
1988-12-31	879
1989-06-30	426
1989-12-31	224
1990-06-30	171
1990-12-31	151
1991-06-30	81
1991-12-31	7
1992-06-30	4
1992-12-31	27
1993-06-30	9
1993-12-31	24
1994-06-30	46
1994-12-31	13
1995-06-30	35
1995-12-31	48
1996-06-30	42
1996-12-31	53
1997-06-30	35
1997-12-31	84
1998-06-30	53
1998-12-31	418
1999-06-30	199