New York (CNN Business) US employers added 312,000 jobs in December, well above what economists expected and underlining that the American economy remains strong despite recent market turbulence.

The unemployment rate rose to 3.9% as more people were looking for work. It had been at a 50-year low of 3.7% for two of the last three months.

Employers added 2.6 million jobs in 2018, compared to 2.2 million in 2017. Revisions to the October and November estimates added an additional 58,000 jobs to the 2018 total.

Economists had expected the pace of hiring would slow in December, as employers had trouble finding the workers they needed. The median forecast of economists surveyed by Refinitiv was for 177,000 new jobs. Instead, employers added the highest number of jobs since February 2018, and the second-highest number of jobs added during any month of the Trump administration.

Paychecks grew as employers raised wages to attract new workers. Average hourly pay was up 3.2% compared to a year earlier. The average number of hours people worked also edged up.

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