??? 1㎏? ??? 0.64pg? ????? ???? ?. ?? ??????(WHO)? 1???????(??1㎏? 1～4pg)? ???. ??? 67%, ??? 38%, ??? 36% ??.

?? ??? ??? ????????? 6?? ?? ????? ????. ???? ??????? ??? ?? ??? ?? ???? ??? ? ??? ???? ???? ?? ???? ???? ????.

?? ?? ???? ?? ???? ??? 53.3%? ???? ??(21.5%) ??(13.2%)? ?. ???? ? ??? ?? ??? 2.2%? ????.

?? ??? △? ??? ???(??) △?? △? △?? ?(???) △?? ? ???(???) △???? ??? ???(??) △?? △?? ?? ?(???)??.

〈?????〉kjk9@donga.com