Bi-annual	US dollars
1987-06-30	29
1987-12-31	23
1988-06-30	31
1988-12-31	25
1989-06-30	19
1989-12-31	16
1990-06-30	19
1990-12-31	17
1991-06-30	15
1991-12-31	19
1992-06-30	19
1992-12-31	6
1993-06-30	3
1993-12-31	1
1994-06-30	0
1994-12-31	5
1995-06-30	0
1995-12-31	12
1996-06-30	0
1996-12-31	0
1997-06-30	2
1997-12-31	8
1998-06-30	8
1998-12-31	8
1999-06-30	9