Bi-annual	US dollars
1987-06-30	92
1987-12-31	92
1988-06-30	49
1988-12-31	34
1989-06-30	68
1989-12-31	82
1990-06-30	99
1990-12-31	6
1991-06-30	11
1991-12-31	9
1992-06-30	11
1992-12-31	18
1993-06-30	14
1993-12-31	27
1994-06-30	22
1994-12-31	28
1995-06-30	45
1995-12-31	50
1996-06-30	40
1996-12-31	51
1997-06-30	58
1997-12-31	39
1998-06-30	35
1998-12-31	25
1999-06-30	33