Bi-annual	US dollars
1987-06-30	8
1987-12-31	9
1988-06-30	19
1988-12-31	7
1989-06-30	11
1989-12-31	13
1990-06-30	9
1990-12-31	19
1991-06-30	0
1991-12-31	4
1992-06-30	6
1992-12-31	3
1993-06-30	5
1993-12-31	3
1994-06-30	6
1994-12-31	9
1995-06-30	11
1995-12-31	40
1996-06-30	36
1996-12-31	19
1997-06-30	38
1997-12-31	25
1998-06-30	28
1998-12-31	25
1999-06-30	33