Bi-annual	US dollars
1987-06-30	18
1987-12-31	32
1988-06-30	34
1988-12-31	69
1989-06-30	37
1989-12-31	61
1990-06-30	49
1990-12-31	48
1991-06-30	52
1991-12-31	47
1992-06-30	38
1992-12-31	32
1993-06-30	35
1993-12-31	201
1994-06-30	49
1994-12-31	38
1995-06-30	27
1995-12-31	28
1996-06-30	11
1996-12-31	29
1997-06-30	10
1997-12-31	20
1998-06-30	17
1998-12-31	108
1999-06-30	24