Bi-annual	US dollars
1987-06-30	52
1987-12-31	40
1988-06-30	26
1988-12-31	9
1989-06-30	22
1989-12-31	13
1990-06-30	10
1990-12-31	29
1991-06-30	16
1991-12-31	13
1992-06-30	8
1992-12-31	20
1993-06-30	51
1993-12-31	27
1994-06-30	179
1994-12-31	111
1995-06-30	46
1995-12-31	57
1996-06-30	84
1996-12-31	110
1997-06-30	30
1997-12-31	247
1998-06-30	60
1998-12-31	47
1999-06-30	251