Bi-annual	US dollars
1987-06-30	150
1987-12-31	4
1988-06-30	15
1988-12-31	13
1989-06-30	14
1989-12-31	11
1990-06-30	10
1990-12-31	54
1991-06-30	11
1991-12-31	166
1992-06-30	11
1992-12-31	11
1993-06-30	24
1993-12-31	40
1994-06-30	34
1994-12-31	25
1995-06-30	22
1995-12-31	375
1996-06-30	16
1996-12-31	380
1997-06-30	461
1997-12-31	69
1998-06-30	98
1998-12-31	303
1999-06-30	76