Bi-annual	US dollars
1987-06-30	185
1987-12-31	168
1988-06-30	280
1988-12-31	127
1989-06-30	171
1989-12-31	153
1990-06-30	181
1990-12-31	189
1991-06-30	293
1991-12-31	209
1992-06-30	223
1992-12-31	218
1993-06-30	437
1993-12-31	851
1994-06-30	1103
1994-12-31	1385
1995-06-30	1273
1995-12-31	885
1996-06-30	844
1996-12-31	967
1997-06-30	1076
1997-12-31	1728
1998-06-30	1762
1998-12-31	1399
1999-06-30	1227