Bi-annual	US dollars
1987-06-30	284
1987-12-31	153
1988-06-30	203
1988-12-31	177
1989-06-30	161
1989-12-31	398
1990-06-30	141
1990-12-31	187
1991-06-30	281
1991-12-31	250
1992-06-30	539
1992-12-31	618
1993-06-30	1155
1993-12-31	1036
1994-06-30	1089
1994-12-31	981
1995-06-30	1285
1995-12-31	1149
1996-06-30	1446
1996-12-31	1690
1997-06-30	2773
1997-12-31	2519
1998-06-30	4477
1998-12-31	5794
1999-06-30	6318