Bi-annual	US dollars
1987-06-30	140
1987-12-31	181
1988-06-30	169
1988-12-31	199
1989-06-30	172
1989-12-31	187
1990-06-30	213
1990-12-31	114
1991-06-30	94
1991-12-31	97
1992-06-30	217
1992-12-31	141
1993-06-30	132
1993-12-31	192
1994-06-30	102
1994-12-31	208
1995-06-30	334
1995-12-31	247
1996-06-30	402
1996-12-31	491
1997-06-30	353
1997-12-31	365
1998-06-30	330
1998-12-31	338
1999-06-30	643