Americans are as eager to work as ever. Just no longer for somebody else.

According to FreshBooks, a cloud-based accounting company that has conducted a study on self-employment for two years, the number of Americans working for themselves looks to triple—to 42 million people—by 2020.

The trend, gauged in a survey of more than 2,700 full-time US workers in traditional, independent, and small business roles about their career plans, is largely being driven by millennial workers. FreshBooks estimates that of the next 27 million independent workers, 42% will be millennials. The survey, conducted with Research Now, also finds that Americans who already work for themselves are suddenly very content to keep doing so, with 97% of independent workers (up 10% from 2016) reporting no desire to return to traditional work.

“Americans are increasingly disillusioned with the notion that a successful career means climbing the corporate ladder,”FreshBooks CEO Mike McDerment told Quartz. “Whether or not the shift to self-employment occurs at the velocity our study indicates or not, the real significance is the mindset shift of the American workforce.”

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