Bi-annual	US dollars
1987-06-30	15
1987-12-31	15
1988-06-30	10
1988-12-31	11
1989-06-30	22
1989-12-31	21
1990-06-30	19
1990-12-31	21
1991-06-30	18
1991-12-31	22
1992-06-30	27
1992-12-31	20
1993-06-30	14
1993-12-31	30
1994-06-30	9
1994-12-31	9
1995-06-30	24
1995-12-31	43
1996-06-30	68
1996-12-31	123
1997-06-30	13
1997-12-31	-16
1998-06-30	7
1998-12-31	55
1999-06-30	0