Bi-annual	US dollars
1987-06-30	284
1987-12-31	119
1988-06-30	169
1988-12-31	143
1989-06-30	140
1989-12-31	121
1990-06-30	218
1990-12-31	203
1991-06-30	92
1991-12-31	114
1992-06-30	95
1992-12-31	156
1993-06-30	329
1993-12-31	1092
1994-06-30	194
1994-12-31	172
1995-06-30	116
1995-12-31	147
1996-06-30	767
1996-12-31	205
1997-06-30	324
1997-12-31	589
1998-06-30	567
1998-12-31	539
1999-06-30	755