The nation's rate of people without health insurance was at historically low levels during President Donald Trump's first several months in office, at the same time he was pushing hard for the elimination of Obamacare, new federal data show.

The data, from the Centers for Disease Control and Prevention, is sure to be used as a measuring stick for how Trump administration policies affect the nation's uninsured rate, which has plummeted since the rollout of the Affordable Care Act.

In the first three months of 2017, just 8.8 percent of Americans — or 28.1 million people — lacked health insurance, the CDC said.

That is about 500,000 fewer uninsured people than in 2016, a difference that the CDC called "nonsignificant" in a report issued by the agency Tuesday.

There are now 20.5 million fewer people without health insurance than there were in 2010, when Obamacare, as the ACA is popularly known, began taking effect, the agency said.

In 2010, 16 percent of Americans, or 48.6 million people, were uninsured at the time of an interview with the CDC.

And as much of 19.8 percent of people had been uninsured for at least part of the year prior to such an interview in 2010.

The CDC's new report comes slightly more than two months before the Nov. 1 start of open enrollment in Obamacare health plans for 2018.