Bi-annual	US dollars
1987-06-30	202
1987-12-31	74
1988-06-30	148
1988-12-31	137
1989-06-30	79
1989-12-31	79
1990-06-30	66
1990-12-31	64
1991-06-30	65
1991-12-31	357
1992-06-30	320
1992-12-31	205
1993-06-30	477
1993-12-31	412
1994-06-30	230
1994-12-31	308
1995-06-30	213
1995-12-31	383
1996-06-30	590
1996-12-31	469
1997-06-30	321
1997-12-31	494
1998-06-30	410
1998-12-31	527
1999-06-30	341