Bi-annual	US dollars
1987-06-30	11
1987-12-31	13
1988-06-30	10
1988-12-31	7
1989-06-30	6
1989-12-31	3
1990-06-30	0
1990-12-31	0
1991-06-30	0
1991-12-31	0
1992-06-30	0
1992-12-31	3
1993-06-30	3
1993-12-31	24
1994-06-30	25
1994-12-31	25
1995-06-30	22
1995-12-31	26
1996-06-30	19
1996-12-31	19
1997-06-30	17
1997-12-31	20
1998-06-30	28
1998-12-31	23
1999-06-30	19