Bi-annual	US dollars
1987-06-30	42
1987-12-31	19
1988-06-30	22
1988-12-31	16
1989-06-30	14
1989-12-31	76
1990-06-30	30
1990-12-31	25
1991-06-30	41
1991-12-31	93
1992-06-30	46
1992-12-31	61
1993-06-30	45
1993-12-31	21
1994-06-30	35
1994-12-31	30
1995-06-30	41
1995-12-31	14
1996-06-30	2
1996-12-31	0
1997-06-30	0
1997-12-31	20
1998-06-30	3
1998-12-31	2
1999-06-30	3