Bi-annual	US dollars
1987-06-30	210
1987-12-31	266
1988-06-30	206
1988-12-31	65
1989-06-30	64
1989-12-31	285
1990-06-30	286
1990-12-31	411
1991-06-30	222
1991-12-31	155
1992-06-30	112
1992-12-31	61
1993-06-30	23
1993-12-31	15
1994-06-30	8
1994-12-31	3
1995-06-30	2
1995-12-31	-8
1996-06-30	-5
1996-12-31	0
1997-06-30	0
1997-12-31	2
1998-06-30	2
1998-12-31	0
1999-06-30	0