Bi-annual	US dollars
1987-06-30	260
1987-12-31	445
1988-06-30	367
1988-12-31	407
1989-06-30	284
1989-12-31	356
1990-06-30	399
1990-12-31	424
1991-06-30	233
1991-12-31	319
1992-06-30	236
1992-12-31	206
1993-06-30	522
1993-12-31	828
1994-06-30	966
1994-12-31	898
1995-06-30	927
1995-12-31	837
1996-06-30	1353
1996-12-31	1346
1997-06-30	1524
1997-12-31	1571
1998-06-30	1354
1998-12-31	1396
1999-06-30	1329