Bi-annual	US dollars
1987-06-30	47
1987-12-31	34
1988-06-30	36
1988-12-31	38
1989-06-30	23
1989-12-31	32
1990-06-30	38
1990-12-31	81
1991-06-30	52
1991-12-31	67
1992-06-30	128
1992-12-31	86
1993-06-30	33
1993-12-31	80
1994-06-30	77
1994-12-31	139
1995-06-30	76
1995-12-31	64
1996-06-30	103
1996-12-31	62
1997-06-30	72
1997-12-31	87
1998-06-30	103
1998-12-31	42
1999-06-30	58