Bi-annual	US dollars
1987-06-30	6
1987-12-31	13
1988-06-30	7
1988-12-31	7
1989-06-30	14
1989-12-31	11
1990-06-30	16
1990-12-31	19
1991-06-30	21
1991-12-31	19
1992-06-30	17
1992-12-31	20
1993-06-30	17
1993-12-31	19
1994-06-30	11
1994-12-31	3
1995-06-30	0
1995-12-31	0
1996-06-30	0
1996-12-31	0
1997-06-30	0
1997-12-31	0
1998-06-30	0
1998-12-31	0
1999-06-30	0