Bi-annual	US dollars
1987-06-30	313
1987-12-31	296
1988-06-30	261
1988-12-31	235
1989-06-30	186
1989-12-31	166
1990-06-30	127
1990-12-31	100
1991-06-30	75
1991-12-31	65
1992-06-30	53
1992-12-31	41
1993-06-30	26
1993-12-31	19
1994-06-30	0
1994-12-31	8
1995-06-30	2
1995-12-31	0
1996-06-30	0
1996-12-31	2
1997-06-30	0
1997-12-31	0
1998-06-30	0
1998-12-31	2
1999-06-30	0