Bi-annual	US dollars
1987-06-30	106
1987-12-31	121
1988-06-30	142
1988-12-31	130
1989-06-30	104
1989-12-31	139
1990-06-30	108
1990-12-31	137
1991-06-30	126
1991-12-31	149
1992-06-30	337
1992-12-31	274
1993-06-30	330
1993-12-31	287
1994-06-30	295
1994-12-31	166
1995-06-30	196
1995-12-31	247
1996-06-30	235
1996-12-31	324
1997-06-30	462
1997-12-31	219
1998-06-30	222
1998-12-31	98
1999-06-30	90