Bi-annual	US dollars
1987-06-30	79
1987-12-31	81
1988-06-30	67
1988-12-31	63
1989-06-30	56
1989-12-31	56
1990-06-30	51
1990-12-31	48
1991-06-30	42
1991-12-31	39
1992-06-30	29
1992-12-31	24
1993-06-30	12
1993-12-31	13
1994-06-30	5
1994-12-31	2
1995-06-30	0
1995-12-31	0
1996-06-30	0
1996-12-31	0
1997-06-30	0
1997-12-31	0
1998-06-30	0
1998-12-31	0
1999-06-30	0