Bi-annual	US dollars
1987-06-30	45
1987-12-31	36
1988-06-30	20
1988-12-31	20
1989-06-30	25
1989-12-31	11
1990-06-30	28
1990-12-31	12
1991-06-30	11
1991-12-31	9
1992-06-30	8
1992-12-31	6
1993-06-30	6
1993-12-31	12
1994-06-30	5
1994-12-31	22
1995-06-30	5
1995-12-31	3
1996-06-30	2
1996-12-31	3
1997-06-30	2
1997-12-31	3
1998-06-30	7
1998-12-31	7
1999-06-30	6