Bi-annual	US dollars
1987-06-30	19
1987-12-31	34
1988-06-30	14
1988-12-31	25
1989-06-30	16
1989-12-31	60
1990-06-30	24
1990-12-31	27
1991-06-30	16
1991-12-31	24
1992-06-30	118
1992-12-31	98
1993-06-30	75
1993-12-31	37
1994-06-30	71
1994-12-31	78
1995-06-30	92
1995-12-31	87
1996-06-30	92
1996-12-31	19
1997-06-30	93
1997-12-31	72
1998-06-30	75
1998-12-31	65
1999-06-30	6