Bi-annual	US dollars
1987-06-30	48
1987-12-31	38
1988-06-30	32
1988-12-31	11
1989-06-30	3
1989-12-31	0
1990-06-30	0
1990-12-31	0
1991-06-30	0
1991-12-31	0
1992-06-30	0
1992-12-31	26
1993-06-30	26
1993-12-31	28
1994-06-30	0
1994-12-31	28
1995-06-30	27
1995-12-31	45
1996-06-30	51
1996-12-31	62
1997-06-30	68
1997-12-31	77
1998-06-30	87
1998-12-31	58
1999-06-30	66