Bi-annual	US dollars
1987-06-30	6
1987-12-31	15
1988-06-30	15
1988-12-31	20
1989-06-30	26
1989-12-31	23
1990-06-30	23
1990-12-31	19
1991-06-30	6
1991-12-31	7
1992-06-30	13
1992-12-31	11
1993-06-30	5
1993-12-31	10
1994-06-30	2
1994-12-31	7
1995-06-30	6
1995-12-31	18
1996-06-30	3
1996-12-31	17
1997-06-30	18
1997-12-31	20
1998-06-30	32
1998-12-31	47
1999-06-30	13