Bi-annual	US dollars
1987-06-30	26
1987-12-31	23
1988-06-30	38
1988-12-31	42
1989-06-30	34
1989-12-31	48
1990-06-30	19
1990-12-31	42
1991-06-30	47
1991-12-31	32
1992-06-30	32
1992-12-31	33
1993-06-30	36
1993-12-31	62
1994-06-30	59
1994-12-31	64
1995-06-30	52
1995-12-31	68
1996-06-30	61
1996-12-31	68
1997-06-30	35
1997-12-31	26
1998-06-30	187
1998-12-31	190
1999-06-30	131