Bi-annual	US dollars
1987-06-30	5
1987-12-31	8
1988-06-30	7
1988-12-31	33
1989-06-30	34
1989-12-31	60
1990-06-30	47
1990-12-31	46
1991-06-30	58
1991-12-31	67
1992-06-30	70
1992-12-31	76
1993-06-30	138
1993-12-31	112
1994-06-30	108
1994-12-31	72
1995-06-30	76
1995-12-31	81
1996-06-30	85
1996-12-31	82
1997-06-30	58
1997-12-31	7
1998-06-30	2
1998-12-31	0
1999-06-30	0