Bi-annual	US dollars
1987-06-30	5
1987-12-31	2
1988-06-30	3
1988-12-31	0
1989-06-30	0
1989-12-31	2
1990-06-30	26
1990-12-31	25
1991-06-30	2
1991-12-31	4
1992-06-30	13
1992-12-31	8
1993-06-30	20
1993-12-31	22
1994-06-30	42
1994-12-31	36
1995-06-30	65
1995-12-31	48
1996-06-30	73
1996-12-31	82
1997-06-30	58
1997-12-31	86
1998-06-30	127
1998-12-31	173
1999-06-30	162