Bi-annual	US dollars
1987-06-30	13
1987-12-31	9
1988-06-30	27
1988-12-31	49
1989-06-30	20
1989-12-31	21
1990-06-30	42
1990-12-31	17
1991-06-30	8
1991-12-31	9
1992-06-30	10
1992-12-31	8
1993-06-30	5
1993-12-31	1
1994-06-30	5
1994-12-31	3
1995-06-30	6
1995-12-31	6
1996-06-30	26
1996-12-31	27
1997-06-30	8
1997-12-31	3
1998-06-30	7
1998-12-31	2
1999-06-30	2