Bi-annual	US dollars
1987-06-30	68
1987-12-31	42
1988-06-30	36
1988-12-31	33
1989-06-30	31
1989-12-31	35
1990-06-30	30
1990-12-31	15
1991-06-30	18
1991-12-31	15
1992-06-30	11
1992-12-31	14
1993-06-30	93
1993-12-31	86
1994-06-30	93
1994-12-31	91
1995-06-30	94
1995-12-31	91
1996-06-30	81
1996-12-31	140
1997-06-30	163
1997-12-31	189
1998-06-30	170
1998-12-31	369
1999-06-30	399