??????????: ????? ???? ?? ?? ??? ?? ??? ?? ??? ???? ??? ????????? ??.It absolutely was originally commenced by the USA to guess within the prices of cotton transmitted within the Ny cotton Trade. Later on within the calendar year 1960, they declined this apply.?????? ????? ???? ?? ?????? ?? ?????? ???? ??????? ??. ?? ??? ?? ?????? ????? ?????? ?? ?