Bi-annual	US dollars
1987-06-30	198
1987-12-31	268
1988-06-30	184
1988-12-31	244
1989-06-30	180
1989-12-31	177
1990-06-30	140
1990-12-31	174
1991-06-30	123
1991-12-31	131
1992-06-30	126
1992-12-31	105
1993-06-30	104
1993-12-31	68
1994-06-30	94
1994-12-31	69
1995-06-30	60
1995-12-31	53
1996-06-30	57
1996-12-31	269
1997-06-30	185
1997-12-31	20
1998-06-30	22
1998-12-31	18
1999-06-30	24