Bi-annual	US dollars
1987-06-30	24
1987-12-31	28
1988-06-30	15
1988-12-31	14
1989-06-30	5
1989-12-31	6
1990-06-30	2
1990-12-31	6
1991-06-30	5
1991-12-31	4
1992-06-30	6
1992-12-31	2
1993-06-30	53
1993-12-31	71
1994-06-30	77
1994-12-31	94
1995-06-30	159
1995-12-31	166
1996-06-30	230
1996-12-31	291
1997-06-30	318
1997-12-31	354
1998-06-30	433
1998-12-31	434
1999-06-30	434