U.S. inflation accelerated in May to the fastest pace in more than six years, reinforcing the Federal Reserve’s outlook for gradual interest-rate hikes while eroding wage gains that remain relatively tepid despite an 18-year low in unemployment.

The consumer price index rose 0.2 percent from the previous month and 2.8 percent from a year earlier, matching estimates, a Labor Department report showed Tuesday. The annual gain was the biggest since February 2012 and follows a 2.5 percent increase in April. Excluding food and energy, the core gauge was up 0.2 percent from the prior month and 2.2 percent from May 2017, also matching the median estimates of economists.

The data “provide further evidence that inflation is moving towards the Fed’s objective,” and the central bank will continue on its gradual rate-hike path, said Kevin Cummins, an economist at NatWest Markets. The pay figures are “a reminder that you don’t need to necessarily get more aggressive in your approach because wages haven’t accelerated as much as they have in the past,” he said.

The Fed’s preferred gauge of inflation — a separate consumption-based figure from the Commerce Department — came in at the central bank’s 2 percent goal during March and April, and the figure tends to run slightly below the Labor Department’s CPI. At the same time, several Fed officials have indicated that a modest overshoot of the inflation goal wouldn’t necessarily warrant faster interest-rate hikes, after years of below-target price gains. Commerce Department figures released May 31 showed the Fed’s preferred gauge of core prices was up 1.8 percent in April from a year earlier.

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A separate Labor Department report on Tuesday illustrated how higher prices are pinching wallets: average hourly wages, adjusted for inflation, were unchanged in May from a year earlier, even as nominal pay accelerated to a 2.7 percent annual gain from 2.6 percent in April. For production and nonsupervisory workers, real average hourly earnings fell 0.1 percent from a year earlier.

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Seasonally adjusted gasoline prices rose 1.7 percent in May from the previous month, after a 3 percent gain in April.