The Clintons donated 10 percent of their gross adjusted income to charity in 2015 and 96 percent of that went to a Clinton-owned entity, according to tax documents released Friday morning.

The other four percent went to a non-profit called Desert Charities, which organizes a charity golf tournament with the Clinton Foundation.

In total, the Clintons donated $1 million to the Clinton Family Foundation and $42,000 to Desert Charities.

The tax filings released Friday also showed the Clintons had an adjusted gross income of $10.6 million in 2015, and that they paid an effective federal tax rate of 34.2 percent.

Their adjusted income decreased by more than $17.4 million from 2014, when Hillary Clinton was still giving paid speeches.

It's important to note that the Clinton Family Foundation is not the same thing as the Clinton Foundation, which has come under scrutiny recently for an alleged pay-for-play scheme during the time Hillary Clinton served as secretary of state. The Clinton Family Foundation is a sort of "clearinghouse for the family's personal philanthropy," according to Nonprofit Quarterly.

Further, the Clintons are the entity's only donors, according to their 2014 tax returns. The Clinton Family Foundation has given cash to a broad range of groups, including New York Public Radio, the American Nurses Foundation and the American Heart.

Clinton's campaign team released her 2015 tax returns Friday morning, and challenged Trump do the same. Democratic vice-presidential nominee Sen. Tim Kaine, D-Va., also released 10 years' worth of tax returns on Friday.

Demanding to see the Republican presidential candidate's tax returns is a familiar tactic, as President Obama, congressional Democrats and the Democratic National Committee made it a central theme during the 2012 election.

Then-Senate Majority Leader Harry Reid, D-Nev., even claimed falsely that the GOP nominee, former Massachusetts Gov. Mitt Romney, had paid no taxes for a decade.

"[Romney] has refused to release his tax returns, as we know. If a person coming before this body wanted to be a cabinet officer, he couldn't be if he did the same refusal Mitt Romney does about tax returns," Reid said on the floor of the U.S. Senate.

"So the word's out that he hasn't paid any taxes for ten years. Let him prove that he has paid taxes, because he hasn't," the senator added.

Romney eventually released his tax returns, which showed he not only paid his taxes, but that he also donated a greater percentage of his income to charity than both Obama and Vice President Joe Biden.

Trump, who absolutely refuses to release his tax information, claims there's "nothing to learn" from his returns, and dismissed Clinton's challenge Friday by characterizing the release of her 2015 filings as a "distraction."