Bi-annual	US dollars
1987-06-30	32
1987-12-31	21
1988-06-30	17
1988-12-31	18
1989-06-30	8
1989-12-31	15
1990-06-30	9
1990-12-31	12
1991-06-30	13
1991-12-31	15
1992-06-30	17
1992-12-31	12
1993-06-30	11
1993-12-31	9
1994-06-30	9
1994-12-31	13
1995-06-30	11
1995-12-31	14
1996-06-30	12
1996-12-31	21
1997-06-30	27
1997-12-31	79
1998-06-30	100
1998-12-31	128
1999-06-30	93