Bi-annual	US dollars
1987-06-30	8
1987-12-31	0
1988-06-30	0
1988-12-31	13
1989-06-30	8
1989-12-31	6
1990-06-30	2
1990-12-31	8
1991-06-30	-2
1991-12-31	-4
1992-06-30	13
1992-12-31	3
1993-06-30	3
1993-12-31	40
1994-06-30	73
1994-12-31	113
1995-06-30	124
1995-12-31	115
1996-06-30	112
1996-12-31	146
1997-06-30	103
1997-12-31	156
1998-06-30	253
1998-12-31	300
1999-06-30	564