Bi-annual	US dollars
1987-06-30	48
1987-12-31	47
1988-06-30	53
1988-12-31	47
1989-06-30	39
1989-12-31	39
1990-06-30	49
1990-12-31	48
1991-06-30	47
1991-12-31	71
1992-06-30	88
1992-12-31	80
1993-06-30	80
1993-12-31	75
1994-06-30	63
1994-12-31	55
1995-06-30	65
1995-12-31	68
1996-06-30	71
1996-12-31	55
1997-06-30	98
1997-12-31	97
1998-06-30	90
1998-12-31	116
1999-06-30	74