Bi-annual	US dollars
1987-06-30	0
1987-12-31	154
1988-06-30	308
1988-12-31	133
1989-06-30	202
1989-12-31	63
1990-06-30	60
1990-12-31	60
1991-06-30	84
1991-12-31	62
1992-06-30	75
1992-12-31	202
1993-06-30	225
1993-12-31	166
1994-06-30	17
1994-12-31	6
1995-06-30	8
1995-12-31	4
1996-06-30	6
1996-12-31	12
1997-06-30	10
1997-12-31	12
1998-06-30	15
1998-12-31	20
1999-06-30	11