Bi-annual	US dollars
1987-06-30	18
1987-12-31	13
1988-06-30	15
1988-12-31	33
1989-06-30	29
1989-12-31	31
1990-06-30	28
1990-12-31	29
1991-06-30	29
1991-12-31	2
1992-06-30	2
1992-12-31	2
1993-06-30	0
1993-12-31	0
1994-06-30	2
1994-12-31	0
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