Bi-annual	US dollars
1987-06-30	32
1987-12-31	21
1988-06-30	14
1988-12-31	13
1989-06-30	3
1989-12-31	8
1990-06-30	9
1990-12-31	19
1991-06-30	32
1991-12-31	13
1992-06-30	32
1992-12-31	38
1993-06-30	45
1993-12-31	22
1994-06-30	31
1994-12-31	39
1995-06-30	32
1995-12-31	25
1996-06-30	33
1996-12-31	46
1997-06-30	110
1997-12-31	63
1998-06-30	55
1998-12-31	27
1999-06-30	27