Bi-annual	US dollars
1987-06-30	755
1987-12-31	742
1988-06-30	539
1988-12-31	490
1989-06-30	524
1989-12-31	650
1990-06-30	610
1990-12-31	772
1991-06-30	504
1991-12-31	799
1992-06-30	521
1992-12-31	653
1993-06-30	2030
1993-12-31	2430
1994-06-30	1900
1994-12-31	1363
1995-06-30	1406
1995-12-31	1625
1996-06-30	1624
1996-12-31	1745
1997-06-30	2098
1997-12-31	1331
1998-06-30	2089
1998-12-31	2095
1999-06-30	1779