Bi-annual	US dollars
1987-06-30	23
1987-12-31	15
1988-06-30	20
1988-12-31	22
1989-06-30	17
1989-12-31	8
1990-06-30	16
1990-12-31	8
1991-06-30	0
1991-12-31	9
1992-06-30	11
1992-12-31	35
1993-06-30	11
1993-12-31	7
1994-06-30	5
1994-12-31	9
1995-06-30	0
1995-12-31	73
1996-06-30	89
1996-12-31	123
1997-06-30	166
1997-12-31	225
1998-06-30	310
1998-12-31	27
1999-06-30	233