Bi-annual	US dollars
1987-06-30	23
1987-12-31	26
1988-06-30	19
1988-12-31	16
1989-06-30	11
1989-12-31	13
1990-06-30	10
1990-12-31	15
1991-06-30	10
1991-12-31	21
1992-06-30	10
1992-12-31	8
1993-06-30	14
1993-12-31	7
1994-06-30	19
1994-12-31	8
1995-06-30	5
1995-12-31	6
1996-06-30	11
1996-12-31	7
1997-06-30	7
1997-12-31	2
1998-06-30	2
1998-12-31	2
1999-06-30	0