Bi-annual	US dollars
1987-06-30	751
1987-12-31	730
1988-06-30	735
1988-12-31	727
1989-06-30	660
1989-12-31	634
1990-06-30	501
1990-12-31	286
1991-06-30	615
1991-12-31	895
1992-06-30	1146
1992-12-31	1201
1993-06-30	1118
1993-12-31	547
1994-06-30	227
1994-12-31	59
1995-06-30	46
1995-12-31	36
1996-06-30	33
1996-12-31	34
1997-06-30	17
1997-12-31	12
1998-06-30	10
1998-12-31	8
1999-06-30	22