Bi-annual	US dollars
1987-06-30	98
1987-12-31	87
1988-06-30	80
1988-12-31	71
1989-06-30	70
1989-12-31	68
1990-06-30	47
1990-12-31	42
1991-06-30	29
1991-12-31	41
1992-06-30	36
1992-12-31	29
1993-06-30	59
1993-12-31	13
1994-06-30	19
1994-12-31	23
1995-06-30	27
1995-12-31	23
1996-06-30	31
1996-12-31	33
1997-06-30	27
1997-12-31	72
1998-06-30	100
1998-12-31	121
1999-06-30	145