Bi-annual	US dollars
1987-06-30	680
1987-12-31	681
1988-06-30	1219
1988-12-31	1054
1989-06-30	724
1989-12-31	658
1990-06-30	696
1990-12-31	388
1991-06-30	388
1991-12-31	557
1992-06-30	1475
1992-12-31	1383
1993-06-30	1588
1993-12-31	1673
1994-06-30	1901
1994-12-31	1887
1995-06-30	2047
1995-12-31	1585
1996-06-30	1883
1996-12-31	1844
1997-06-30	1955
1997-12-31	2164
1998-06-30	1964
1998-12-31	1884
1999-06-30	1867