Inflation soared over the past year at its highest rate in four decades, hammering America’s consumers, wiping out pay raises and reinforcing the Federal Reserve’s decision to begin raising borrowing rates across the economy, Associated Press reported.

The Labor Department said Thursday that consumer prices jumped 7.5% last month compared with 12 months earlier, the steepest year-over-year increase since February 1982. Shortages of supplies and workers, heavy doses of federal aid, ultra-low interest rates and robust consumer spending combined to send inflation accelerating in the past year.

When measured from December to January, inflation was 0.6%, the same as the previous month and more than economists had expected. Prices had risen 0.7% from October to November and 0.9% from September to October.

There are few signs that inflation will slow significantly anytime soon. Most of the factors that have forced up prices since last spring remain in place: Wages are rising at the fastest pace in at least 20 years. Ports and warehouses are overwhelmed, with hundreds of workers at the ports of Los Angeles and Long Beach, the nation’s busiest, out sick last month. Many products and parts remain in short supply as a result.