Bi-annual	US dollars
1987-06-30	81
1987-12-31	177
1988-06-30	217
1988-12-31	199
1989-06-30	88
1989-12-31	92
1990-06-30	94
1990-12-31	83
1991-06-30	78
1991-12-31	88
1992-06-30	38
1992-12-31	86
1993-06-30	41
1993-12-31	112
1994-06-30	147
1994-12-31	186
1995-06-30	150
1995-12-31	109
1996-06-30	180
1996-12-31	224
1997-06-30	195
1997-12-31	169
1998-06-30	207
1998-12-31	235
1999-06-30	221