Bi-annual	US dollars
1987-06-30	169
1987-12-31	226
1988-06-30	147
1988-12-31	76
1989-06-30	79
1989-12-31	74
1990-06-30	75
1990-12-31	79
1991-06-30	81
1991-12-31	118
1992-06-30	110
1992-12-31	74
1993-06-30	102
1993-12-31	167
1994-06-30	176
1994-12-31	239
1995-06-30	227
1995-12-31	192
1996-06-30	144
1996-12-31	181
1997-06-30	238
1997-12-31	551
1998-06-30	525
1998-12-31	45
1999-06-30	758