Bi-annual	US dollars
1987-06-30	37
1987-12-31	40
1988-06-30	36
1988-12-31	33
1989-06-30	29
1989-12-31	37
1990-06-30	37
1990-12-31	39
1991-06-30	32
1991-12-31	45
1992-06-30	40
1992-12-31	38
1993-06-30	35
1993-12-31	25
1994-06-30	23
1994-12-31	42
1995-06-30	24
1995-12-31	16
1996-06-30	8
1996-12-31	21
1997-06-30	0
1997-12-31	0
1998-06-30	0
1998-12-31	8
1999-06-30	5