Bi-annual	US dollars
1987-06-30	6
1987-12-31	47
1988-06-30	53
1988-12-31	33
1989-06-30	74
1989-12-31	31
1990-06-30	31
1990-12-31	27
1991-06-30	45
1991-12-31	64
1992-06-30	107
1992-12-31	44
1993-06-30	221
1993-12-31	55
1994-06-30	25
1994-12-31	45
1995-06-30	29
1995-12-31	110
1996-06-30	129
1996-12-31	80
1997-06-30	53
1997-12-31	53
1998-06-30	35
1998-12-31	102
1999-06-30	3