U.S. inflation accelerated to a 7.5% annual rate in January, reaching a four-decade high as strong consumer demand and pandemic-related supply constraints kept pushing up prices.

The Labor Department on Thursday said the consumer-price index—which measures what consumers pay for goods and services—was last month at its highest level since February 1982, when compared with January a year ago, and higher than December’s 7% annual rate. Inflation has been above 5% for the past eight months as a U.S. rebound from earlier in the Covid-19 pandemic created imbalances in the economy.