Bi-annual	US dollars
1987-06-30	5
1987-12-31	2
1988-06-30	2
1988-12-31	0
1989-06-30	0
1989-12-31	0
1990-06-30	0
1990-12-31	0
1991-06-30	0
1991-12-31	26
1992-06-30	27
1992-12-31	20
1993-06-30	1133
1993-12-31	1135
1994-06-30	1147
1994-12-31	1144
1995-06-30	1017
1995-12-31	1050
1996-06-30	997
1996-12-31	972
1997-06-30	1075
1997-12-31	1066
1998-06-30	990
1998-12-31	729
1999-06-30	952