Bi-annual	US dollars
1987-06-30	39
1987-12-31	36
1988-06-30	32
1988-12-31	24
1989-06-30	14
1989-12-31	3
1990-06-30	5
1990-12-31	4
1991-06-30	0
1991-12-31	2
1992-06-30	23
1992-12-31	20
1993-06-30	41
1993-12-31	40
1994-06-30	31
1994-12-31	22
1995-06-30	54
1995-12-31	36
1996-06-30	45
1996-12-31	17
1997-06-30	10
1997-12-31	13
1998-06-30	23
1998-12-31	43
1999-06-30	28