Bi-annual	US dollars
1987-06-30	5
1987-12-31	30
1988-06-30	5
1988-12-31	4
1989-06-30	5
1989-12-31	3
1990-06-30	3
1990-12-31	4
1991-06-30	3
1991-12-31	6
1992-06-30	6
1992-12-31	8
1993-06-30	17
1993-12-31	22
1994-06-30	17
1994-12-31	30
1995-06-30	25
1995-12-31	26
1996-06-30	20
1996-12-31	38
1997-06-30	37
1997-12-31	74
1998-06-30	37
1998-12-31	68
1999-06-30	32