Bi-annual	US dollars
1987-06-30	60
1987-12-31	43
1988-06-30	94
1988-12-31	71
1989-06-30	81
1989-12-31	105
1990-06-30	73
1990-12-31	6
1991-06-30	11
1991-12-31	32
1992-06-30	164
1992-12-31	142
1993-06-30	183
1993-12-31	41
1994-06-30	71
1994-12-31	81
1995-06-30	142
1995-12-31	107
1996-06-30	107
1996-12-31	159
1997-06-30	42
1997-12-31	120
1998-06-30	120
1998-12-31	52
1999-06-30	41