Bi-annual	US dollars
1987-06-30	37
1987-12-31	60
1988-06-30	58
1988-12-31	24
1989-06-30	23
1989-12-31	16
1990-06-30	16
1990-12-31	0
1991-06-30	0
1991-12-31	0
1992-06-30	2
1992-12-31	2
1993-06-30	2
1993-12-31	13
1994-06-30	8
1994-12-31	23
1995-06-30	16
1995-12-31	12
1996-06-30	9
1996-12-31	17
1997-06-30	32
1997-12-31	38
1998-06-30	47
1998-12-31	33
1999-06-30	22