Bi-annual	US dollars
1987-06-30	279
1987-12-31	330
1988-06-30	442
1988-12-31	524
1989-06-30	271
1989-12-31	337
1990-06-30	253
1990-12-31	268
1991-06-30	250
1991-12-31	187
1992-06-30	938
1992-12-31	856
1993-06-30	687
1993-12-31	795
1994-06-30	765
1994-12-31	656
1995-06-30	1392
1995-12-31	1485
1996-06-30	2051
1996-12-31	1808
1997-06-30	1526
1997-12-31	1387
1998-06-30	1377
1998-12-31	754
1999-06-30	1482