Bi-annual	US dollars
1987-06-30	85
1987-12-31	15
1988-06-30	31
1988-12-31	5
1989-06-30	20
1989-12-31	-16
1990-06-30	9
1990-12-31	81
1991-06-30	49
1991-12-31	84
1992-06-30	-11
1992-12-31	15
1993-06-30	212
1993-12-31	250
1994-06-30	302
1994-12-31	335
1995-06-30	466
1995-12-31	327
1996-06-30	382
1996-12-31	669
1997-06-30	812
1997-12-31	4928
1998-06-30	1382
1998-12-31	5689
1999-06-30	1203