Bi-annual	US dollars
1987-06-30	55
1987-12-31	42
1988-06-30	38
1988-12-31	34
1989-06-30	60
1989-12-31	39
1990-06-30	127
1990-12-31	112
1991-06-30	182
1991-12-31	207
1992-06-30	204
1992-12-31	232
1993-06-30	488
1993-12-31	754
1994-06-30	991
1994-12-31	854
1995-06-30	1230
1995-12-31	1684
1996-06-30	1689
1996-12-31	1780
1997-06-30	1627
1997-12-31	1336
1998-06-30	1462
1998-12-31	1160
1999-06-30	954