Bi-annual	US dollars
1987-06-30	94
1987-12-31	109
1988-06-30	87
1988-12-31	90
1989-06-30	73
1989-12-31	77
1990-06-30	66
1990-12-31	71
1991-06-30	62
1991-12-31	73
1992-06-30	74
1992-12-31	39
1993-06-30	35
1993-12-31	37
1994-06-30	40
1994-12-31	39
1995-06-30	43
1995-12-31	43
1996-06-30	40
1996-12-31	39
1997-06-30	35
1997-12-31	36
1998-06-30	37
1998-12-31	48
1999-06-30	44