Bi-annual	US dollars
1987-06-30	10
1987-12-31	17
1988-06-30	26
1988-12-31	33
1989-06-30	12
1989-12-31	32
1990-06-30	23
1990-12-31	56
1991-06-30	39
1991-12-31	41
1992-06-30	36
1992-12-31	48
1993-06-30	57
1993-12-31	62
1994-06-30	76
1994-12-31	81
1995-06-30	95
1995-12-31	152
1996-06-30	82
1996-12-31	113
1997-06-30	77
1997-12-31	56
1998-06-30	42
1998-12-31	20
1999-06-30	32