Bi-annual	US dollars
1987-06-30	15
1987-12-31	34
1988-06-30	9
1988-12-31	24
1989-06-30	14
1989-12-31	10
1990-06-30	5
1990-12-31	12
1991-06-30	2
1991-12-31	2
1992-06-30	4
1992-12-31	6
1993-06-30	12
1993-12-31	6
1994-06-30	9
1994-12-31	6
1995-06-30	8
1995-12-31	26
1996-06-30	22
1996-12-31	27
1997-06-30	7
1997-12-31	18
1998-06-30	7
1998-12-31	12
1999-06-30	73