Bi-annual	US dollars
1987-06-30	40
1987-12-31	57
1988-06-30	49
1988-12-31	65
1989-06-30	53
1989-12-31	73
1990-06-30	49
1990-12-31	41
1991-06-30	36
1991-12-31	50
1992-06-30	34
1992-12-31	32
1993-06-30	27
1993-12-31	15
1994-06-30	11
1994-12-31	11
1995-06-30	11
1995-12-31	8
1996-06-30	11
1996-12-31	7
1997-06-30	3
1997-12-31	10
1998-06-30	5
1998-12-31	28
1999-06-30	27