Bi-annual	US dollars
1987-06-30	8
1987-12-31	23
1988-06-30	14
1988-12-31	12
1989-06-30	26
1989-12-31	10
1990-06-30	10
1990-12-31	13
1991-06-30	6
1991-12-31	11
1992-06-30	5
1992-12-31	6
1993-06-30	6
1993-12-31	44
1994-06-30	20
1994-12-31	37
1995-06-30	30
1995-12-31	39
1996-06-30	60
1996-12-31	88
1997-06-30	77
1997-12-31	53
1998-06-30	87
1998-12-31	92
1999-06-30	113