Bi-annual	US dollars
1987-06-30	24
1987-12-31	38
1988-06-30	19
1988-12-31	16
1989-06-30	14
1989-12-31	11
1990-06-30	12
1990-12-31	12
1991-06-30	16
1991-12-31	22
1992-06-30	44
1992-12-31	38
1993-06-30	15
1993-12-31	6
1994-06-30	11
1994-12-31	8
1995-06-30	6
1995-12-31	16
1996-06-30	8
1996-12-31	41
1997-06-30	123
1997-12-31	10
1998-06-30	60
1998-12-31	93
1999-06-30	27