Bi-annual	US dollars
1987-06-30	97
1987-12-31	77
1988-06-30	70
1988-12-31	65
1989-06-30	56
1989-12-31	71
1990-06-30	35
1990-12-31	23
1991-06-30	26
1991-12-31	19
1992-06-30	25
1992-12-31	17
1993-06-30	20
1993-12-31	18
1994-06-30	28
1994-12-31	33
1995-06-30	30
1995-12-31	33
1996-06-30	16
1996-12-31	68
1997-06-30	113
1997-12-31	54
1998-06-30	13
1998-12-31	23
1999-06-30	24