Bi-annual	US dollars
1987-06-30	3
1987-12-31	8
1988-06-30	12
1988-12-31	13
1989-06-30	25
1989-12-31	23
1990-06-30	21
1990-12-31	44
1991-06-30	5
1991-12-31	15
1992-06-30	42
1992-12-31	17
1993-06-30	32
1993-12-31	10
1994-06-30	12
1994-12-31	5
1995-06-30	2
1995-12-31	31
1996-06-30	34
1996-12-31	79
1997-06-30	40
1997-12-31	69
1998-06-30	20
1998-12-31	116
1999-06-30	0