Bi-annual	US dollars
1987-06-30	135
1987-12-31	87
1988-06-30	87
1988-12-31	235
1989-06-30	257
1989-12-31	292
1990-06-30	223
1990-12-31	330
1991-06-30	211
1991-12-31	314
1992-06-30	411
1992-12-31	1642
1993-06-30	3358
1993-12-31	4789
1994-06-30	2795
1994-12-31	4457
1995-06-30	4442
1995-12-31	4172
1996-06-30	3755
1996-12-31	4179
1997-06-30	6197
1997-12-31	5905
1998-06-30	5475
1998-12-31	4110
1999-06-30	3239