Bi-annual	US dollars
1987-06-30	0
1987-12-31	0
1988-06-30	9
1988-12-31	18
1989-06-30	9
1989-12-31	10
1990-06-30	12
1990-12-31	35
1991-06-30	10
1991-12-31	11
1992-06-30	15
1992-12-31	5
1993-06-30	23
1993-12-31	18
1994-06-30	29
1994-12-31	72
1995-06-30	43
1995-12-31	48
1996-06-30	56
1996-12-31	56
1997-06-30	55
1997-12-31	49
1998-06-30	70
1998-12-31	63
1999-06-30	49