你也许把Core CPI和CPI-W 搞混了.在计算Core CPI时特意减去了食品和能源二项因为它们变化太快。而社保局

在计算你退休金增幅%时用的是根据CPI-W（这点你没说错，）， 而不是 CPI， 那是给劳工统计局用的。

The Bureau of Labor Statistics (BLS) publishes the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) on a monthly basis. We use the CPI-W to annually adjust benefits paid to Social Security beneficiaries and Supplemental Security Income recipients.