Bi-annual	US dollars
1987-06-30	69
1987-12-31	62
1988-06-30	107
1988-12-31	87
1989-06-30	113
1989-12-31	153
1990-06-30	166
1990-12-31	83
1991-06-30	117
1991-12-31	187
1992-06-30	312
1992-12-31	342
1993-06-30	813
1993-12-31	808
1994-06-30	989
1994-12-31	1137
1995-06-30	1446
1995-12-31	1594
1996-06-30	1759
1996-12-31	2198
1997-06-30	2151
1997-12-31	2326
1998-06-30	2676
1998-12-31	1937
1999-06-30	1105