Bi-annual	US dollars
1987-06-30	97
1987-12-31	109
1988-06-30	101
1988-12-31	71
1989-06-30	192
1989-12-31	182
1990-06-30	176
1990-12-31	145
1991-06-30	114
1991-12-31	73
1992-06-30	74
1992-12-31	129
1993-06-30	78
1993-12-31	25
1994-06-30	140
1994-12-31	120
1995-06-30	113
1995-12-31	143
1996-06-30	241
1996-12-31	236
1997-06-30	324
1997-12-31	364
1998-06-30	762
1998-12-31	453
1999-06-30	402