Bi-annual	US dollars
1987-06-30	21
1987-12-31	23
1988-06-30	34
1988-12-31	42
1989-06-30	76
1989-12-31	53
1990-06-30	38
1990-12-31	14
1991-06-30	24
1991-12-31	9
1992-06-30	10
1992-12-31	6
1993-06-30	8
1993-12-31	21
1994-06-30	69
1994-12-31	5
1995-06-30	45
1995-12-31	9
1996-06-30	6
1996-12-31	0
1997-06-30	35
1997-12-31	38
1998-06-30	47
1998-12-31	40
1999-06-30	43