Bi-annual	US dollars
1987-06-30	190
1987-12-31	138
1988-06-30	121
1988-12-31	127
1989-06-30	71
1989-12-31	69
1990-06-30	91
1990-12-31	127
1991-06-30	110
1991-12-31	97
1992-06-30	74
1992-12-31	47
1993-06-30	53
1993-12-31	137
1994-06-30	130
1994-12-31	130
1995-06-30	165
1995-12-31	136
1996-06-30	134
1996-12-31	144
1997-06-30	221
1997-12-31	130
1998-06-30	120
1998-12-31	166
1999-06-30	148