Bi-annual	US dollars
1987-06-30	87
1987-12-31	87
1988-06-30	90
1988-12-31	80
1989-06-30	59
1989-12-31	69
1990-06-30	68
1990-12-31	48
1991-06-30	23
1991-12-31	45
1992-06-30	13
1992-12-31	6
1993-06-30	26
1993-12-31	3
1994-06-30	2
1994-12-31	3
1995-06-30	3
1995-12-31	22
1996-06-30	8
1996-12-31	3
1997-06-30	10
1997-12-31	18
1998-06-30	2
1998-12-31	0
1999-06-30	54