Bi-annual	US dollars
1987-06-30	232
1987-12-31	274
1988-06-30	244
1988-12-31	213
1989-06-30	285
1989-12-31	223
1990-06-30	215
1990-12-31	264
1991-06-30	318
1991-12-31	205
1992-06-30	540
1992-12-31	382
1993-06-30	81
1993-12-31	96
1994-06-30	73
1994-12-31	114
1995-06-30	215
1995-12-31	126
1996-06-30	238
1996-12-31	137
1997-06-30	28
1997-12-31	54
1998-06-30	268
1998-12-31	40
1999-06-30	407