Bi-annual	US dollars
1987-06-30	66
1987-12-31	77
1988-06-30	75
1988-12-31	67
1989-06-30	65
1989-12-31	69
1990-06-30	127
1990-12-31	68
1991-06-30	65
1991-12-31	69
1992-06-30	59
1992-12-31	174
1993-06-30	222
1993-12-31	41
1994-06-30	49
1994-12-31	47
1995-06-30	52
1995-12-31	53
1996-06-30	45
1996-12-31	118
1997-06-30	128
1997-12-31	145
1998-06-30	140
1998-12-31	143
1999-06-30	120