Bi-annual	US dollars
1987-06-30	5
1987-12-31	13
1988-06-30	24
1988-12-31	20
1989-06-30	9
1989-12-31	3
1990-06-30	3
1990-12-31	4
1991-06-30	16
1991-12-31	13
1992-06-30	6
1992-12-31	6
1993-06-30	0
1993-12-31	1
1994-06-30	11
1994-12-31	5
1995-06-30	8
1995-12-31	6
1996-06-30	12
1996-12-31	17
1997-06-30	33
1997-12-31	20
1998-06-30	12
1998-12-31	22
1999-06-30	13