Bi-annual	US dollars
1987-06-30	13
1987-12-31	19
1988-06-30	17
1988-12-31	18
1989-06-30	23
1989-12-31	15
1990-06-30	10
1990-12-31	12
1991-06-30	8
1991-12-31	7
1992-06-30	10
1992-12-31	11
1993-06-30	11
1993-12-31	0
1994-06-30	2
1994-12-31	2
1995-06-30	0
1995-12-31	2
1996-06-30	5
1996-12-31	5
1997-06-30	17
1997-12-31	7
1998-06-30	10
1998-12-31	13
1999-06-30	17