Bi-annual	US dollars
1987-06-30	74
1987-12-31	60
1988-06-30	46
1988-12-31	18
1989-06-30	16
1989-12-31	10
1990-06-30	26
1990-12-31	27
1991-06-30	13
1991-12-31	24
1992-06-30	27
1992-12-31	26
1993-06-30	26
1993-12-31	25
1994-06-30	62
1994-12-31	86
1995-06-30	62
1995-12-31	118
1996-06-30	62
1996-12-31	56
1997-06-30	68
1997-12-31	76
1998-06-30	110
1998-12-31	113
1999-06-30	96