Bi-annual	US dollars
1987-06-30	50
1987-12-31	62
1988-06-30	46
1988-12-31	36
1989-06-30	25
1989-12-31	27
1990-06-30	24
1990-12-31	123
1991-06-30	110
1991-12-31	134
1992-06-30	107
1992-12-31	126
1993-06-30	215
1993-12-31	352
1994-06-30	489
1994-12-31	147
1995-06-30	124
1995-12-31	178
1996-06-30	269
1996-12-31	197
1997-06-30	198
1997-12-31	123
1998-06-30	170
1998-12-31	178
1999-06-30	180