Bi-annual	US dollars
1987-06-30	140
1987-12-31	102
1988-06-30	78
1988-12-31	69
1989-06-30	93
1989-12-31	52
1990-06-30	82
1990-12-31	44
1991-06-30	39
1991-12-31	47
1992-06-30	226
1992-12-31	126
1993-06-30	147
1993-12-31	133
1994-06-30	190
1994-12-31	207
1995-06-30	218
1995-12-31	240
1996-06-30	239
1996-12-31	226
1997-06-30	221
1997-12-31	250
1998-06-30	253
1998-12-31	225
1999-06-30	246