Bi-annual	US dollars
1987-06-30	103
1987-12-31	21
1988-06-30	53
1988-12-31	98
1989-06-30	17
1989-12-31	52
1990-06-30	49
1990-12-31	25
1991-06-30	71
1991-12-31	90
1992-06-30	32
1992-12-31	35
1993-06-30	24
1993-12-31	27
1994-06-30	113
1994-12-31	27
1995-06-30	24
1995-12-31	19
1996-06-30	20
1996-12-31	33
1997-06-30	20
1997-12-31	23
1998-06-30	38
1998-12-31	25
1999-06-30	41