This year's rise, an average of 2.7 percent, may be a fraction lower than last year's, but it is still well above the official Consumer PriceIndex (CPI) measure of inflation.
The index works by taking a weighted average of the price of imported iron and domestically produced iron ore to produce a composite number.
这种指数通过对进口铁和国产铁矿石取以加权平均价格以此产生一个合成数。
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Earlier this week, when China released its economic figures for July, the average cost of goods - or Consumer PriceIndex - was up 6.5 percent, its biggest increase in three years.