Bi-annual	US dollars
1987-06-30	13
1987-12-31	8
1988-06-30	14
1988-12-31	5
1989-06-30	42
1989-12-31	10
1990-06-30	16
1990-12-31	17
1991-06-30	18
1991-12-31	4
1992-06-30	10
1992-12-31	3
1993-06-30	17
1993-12-31	16
1994-06-30	37
1994-12-31	31
1995-06-30	24
1995-12-31	23
1996-06-30	19
1996-12-31	22
1997-06-30	35
1997-12-31	36
1998-06-30	32
1998-12-31	28
1999-06-30	74