[经] indexes of prices received by farmers

nóng hù shòu huò jià gé zhǐ shù ㄋㄨㄥˊ ㄏㄨˋ ㄕㄡˋ ㄏㄨㄛˋ ㄐㄧㄚˋ ㄍㄜˊ ㄓˇ ㄕㄨˋ