Bi-annual	US dollars
1987-06-30	84
1987-12-31	130
1988-06-30	106
1988-12-31	221
1989-06-30	138
1989-12-31	176
1990-06-30	201
1990-12-31	232
1991-06-30	92
1991-12-31	125
1992-06-30	82
1992-12-31	68
1993-06-30	141
1993-12-31	84
1994-06-30	69
1994-12-31	74
1995-06-30	127
1995-12-31	78
1996-06-30	172
1996-12-31	363
1997-06-30	50
1997-12-31	48
1998-06-30	27
1998-12-31	7
1999-06-30	20