Bi-annual	US dollars
1987-06-30	105
1987-12-31	62
1988-06-30	58
1988-12-31	54
1989-06-30	28
1989-12-31	23
1990-06-30	38
1990-12-31	93
1991-06-30	91
1991-12-31	99
1992-06-30	95
1992-12-31	20
1993-06-30	12
1993-12-31	109
1994-06-30	139
1994-12-31	22
1995-06-30	8
1995-12-31	36
1996-06-30	45
1996-12-31	21
1997-06-30	8
1997-12-31	20
1998-06-30	0
1998-12-31	2
1999-06-30	2