Bi-annual	US dollars
1987-06-30	8
1987-12-31	19
1988-06-30	17
1988-12-31	11
1989-06-30	14
1989-12-31	13
1990-06-30	5
1990-12-31	4
1991-06-30	6
1991-12-31	6
1992-06-30	0
1992-12-31	5
1993-06-30	5
1993-12-31	0
1994-06-30	0
1994-12-31	22
1995-06-30	0
1995-12-31	8
1996-06-30	31
1996-12-31	29
1997-06-30	23
1997-12-31	20
1998-06-30	28
1998-12-31	30
1999-06-30	25