Bi-annual	US dollars
1987-06-30	40
1987-12-31	34
1988-06-30	49
1988-12-31	58
1989-06-30	33
1989-12-31	34
1990-06-30	45
1990-12-31	37
1991-06-30	23
1991-12-31	28
1992-06-30	40
1992-12-31	50
1993-06-30	71
1993-12-31	53
1994-06-30	48
1994-12-31	45
1995-06-30	40
1995-12-31	28
1996-06-30	22
1996-12-31	41
1997-06-30	35
1997-12-31	13
1998-06-30	8
1998-12-31	10
1999-06-30	8