Bi-annual	US dollars
1987-06-30	10
1987-12-31	11
1988-06-30	12
1988-12-31	5
1989-06-30	0
1989-12-31	2
1990-06-30	0
1990-12-31	0
1991-06-30	0
1991-12-31	0
1992-06-30	91
1992-12-31	80
1993-06-30	77
1993-12-31	50
1994-06-30	114
1994-12-31	94
1995-06-30	156
1995-12-31	186
1996-06-30	222
1996-12-31	193
1997-06-30	185
1997-12-31	163
1998-06-30	42
1998-12-31	116
1999-06-30	6