Bi-annual	US dollars
1987-06-30	111
1987-12-31	9
1988-06-30	17
1988-12-31	38
1989-06-30	33
1989-12-31	27
1990-06-30	26
1990-12-31	21
1991-06-30	97
1991-12-31	52
1992-06-30	59
1992-12-31	23
1993-06-30	290
1993-12-31	64
1994-06-30	49
1994-12-31	80
1995-06-30	56
1995-12-31	101
1996-06-30	204
1996-12-31	180
1997-06-30	256
1997-12-31	196
1998-06-30	338
1998-12-31	221
1999-06-30	224