你也許把Core CPI和CPI-W 搞混了.在計算Core CPI時特意減去了食品和能源二項因為它們變化太快。而社保局

在計算你退休金增幅%時用的是根據CPI-W（這點你沒說錯，）， 而不是 CPI， 那是給勞工統計局用的。

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.