Bi-annual	US dollars
1987-06-30	263
1987-12-31	255
1988-06-30	174
1988-12-31	197
1989-06-30	563
1989-12-31	658
1990-06-30	691
1990-12-31	596
1991-06-30	381
1991-12-31	407
1992-06-30	320
1992-12-31	758
1993-06-30	375
1993-12-31	1162
1994-06-30	923
1994-12-31	1421
1995-06-30	1779
1995-12-31	1273
1996-06-30	1162
1996-12-31	1317
1997-06-30	1602
1997-12-31	2262
1998-06-30	1786
1998-12-31	1564
1999-06-30	1638