The number of foreign workers working for American companies rose by 6.2 percent in April from a year earlier, the Labor Department said on Thursday.
In the month ended March, nearly 3 million foreign workers arrived in the United States, up from 1.7 million the year before.
Expatriates made up 16.6 percent of the foreign workers employed in April, compared with 16.4 percent in March, the bureau said.
The U.S. has the second-largest expatriation industry in the world, after China, the data show.
A survey by the University of Michigan’s Institute of International Finance in December found that more than 10 percent of American businesses employ expatriated workers.