Nonfarm productivity, a measure of output against hours worked, declined 7.5% from January through March, the biggest fall since the third quarter of 1947.

At the same time, unit labor costs soared 11.6%, bringing the increase over the past four quarters to 7.2%, the biggest gain since the third quarter of 1982. The metric calculates how much employers pay workers in salary and benefits per unit of output.

Wall Street already had been looking for a 5.2% drop in productivity and an increase of 10.5% in unit labor costs. On a four-quarter basis, productivity fell 0.6%, the biggest decline since the fourth quarter of 1993.

Taken together, the numbers underline the inflation surge in the U.S., which has seen prices rise at the fastest level in more than 40 years. Federal Reserve officials on Wednesday announced they would be raising interest rates half a percentage point as part of an ongoing effort to control inflation.