Bi-annual	US dollars
1987-06-30	11
1987-12-31	13
1988-06-30	17
1988-12-31	33
1989-06-30	28
1989-12-31	44
1990-06-30	49
1990-12-31	54
1991-06-30	60
1991-12-31	69
1992-06-30	72
1992-12-31	53
1993-06-30	41
1993-12-31	40
1994-06-30	40
1994-12-31	36
1995-06-30	33
1995-12-31	28
1996-06-30	23
1996-12-31	21
1997-06-30	10
1997-12-31	8
1998-06-30	5
1998-12-31	3
1999-06-30	3