Bi-annual	US dollars
1987-06-30	8
1987-12-31	49
1988-06-30	19
1988-12-31	22
1989-06-30	40
1989-12-31	48
1990-06-30	54
1990-12-31	44
1991-06-30	28
1991-12-31	24
1992-06-30	13
1992-12-31	38
1993-06-30	56
1993-12-31	56
1994-06-30	54
1994-12-31	64
1995-06-30	73
1995-12-31	68
1996-06-30	71
1996-12-31	216
1997-06-30	121
1997-12-31	74
1998-06-30	100
1998-12-31	110
1999-06-30	156