Bi-annual	US dollars
1987-06-30	290
1987-12-31	281
1988-06-30	334
1988-12-31	329
1989-06-30	277
1989-12-31	273
1990-06-30	269
1990-12-31	274
1991-06-30	227
1991-12-31	269
1992-06-30	261
1992-12-31	97
1993-06-30	83
1993-12-31	50
1994-06-30	32
1994-12-31	22
1995-06-30	19
1995-12-31	8
1996-06-30	8
1996-12-31	12
1997-06-30	10
1997-12-31	8
1998-06-30	0
1998-12-31	0
1999-06-30	0