The “No Kings Day” nationwide rallies against Donald Trump/for democracy on Saturday turned out millions of people.

That’s per a collective crowdsourcing effort led by Strength In Numbers, and involving many members of the independent data journalism community. We systematized reports from official sources, accounts from the media, and self-reported attendance from thousands of social media posts into a single spreadsheet. (Researchers, please take our data!)

As of midnight on Sunday, June 15, we have data from about 40% of No Kings Day events held yesterday, accounting for over 2.6m attendees. According to our back-of-the-envelope math, that puts total attendance somewhere in the 4-6 million people range. That means roughly 1.2-1.8% of the U.S. population attended a No Kings Day event somewhere in the country yesterday. Organizers say 5m turned out, but don’t release public event-by-event numbers.