Bi-annual	US dollars
1987-06-30	245
1987-12-31	240
1988-06-30	152
1988-12-31	123
1989-06-30	99
1989-12-31	145
1990-06-30	96
1990-12-31	79
1991-06-30	79
1991-12-31	106
1992-06-30	99
1992-12-31	67
1993-06-30	96
1993-12-31	62
1994-06-30	74
1994-12-31	89
1995-06-30	110
1995-12-31	99
1996-06-30	134
1996-12-31	147
1997-06-30	131
1997-12-31	165
1998-06-30	777
1998-12-31	709
1999-06-30	1181