Bi-annual	US dollars
1987-06-30	16
1987-12-31	8
1988-06-30	48
1988-12-31	45
1989-06-30	6
1989-12-31	8
1990-06-30	26
1990-12-31	23
1991-06-30	23
1991-12-31	43
1992-06-30	10
1992-12-31	21
1993-06-30	21
1993-12-31	30
1994-06-30	20
1994-12-31	58
1995-06-30	38
1995-12-31	68
1996-06-30	179
1996-12-31	51
1997-06-30	35
1997-12-31	87
1998-06-30	48
1998-12-31	43
1999-06-30	6