Bi-annual	US dollars
1987-06-30	5
1987-12-31	6
1988-06-30	5
1988-12-31	2
1989-06-30	3
1989-12-31	3
1990-06-30	5
1990-12-31	6
1991-06-30	5
1991-12-31	6
1992-06-30	4
1992-12-31	0
1993-06-30	24
1993-12-31	25
1994-06-30	28
1994-12-31	42
1995-06-30	49
1995-12-31	48
1996-06-30	28
1996-12-31	53
1997-06-30	42
1997-12-31	66
1998-06-30	145
1998-12-31	126
1999-06-30	93