Americans are parking more money with the biggest banks than ever before, cementing the firms’ dominance of the financial industry less than a decade after the 2008 crisis.

The three largest U.S. banks by assets have added more than $2.4 trillion in domestic deposits over the past 10 years, a 180% increase, according to a Wall Street Journal analysis of regulatory data. That amount exceeds what the top eight banks had in such deposits combined in 2007.

The outsize gain began when the trio of lenders— JPMorgan Chase & Co., Bank of America Corp. and Wells Fargo & Co.—did huge deals during the financial crisis. Their heft has continued to increase in recent years as consumers opt to put their money at the behemoths over smaller U.S. banks.

While the crisis led many to question whether banks had become too large, the lead of the biggest lenders has only widened. At the end of 2007, the three banks held 20% of the country’s deposits. By the end of 2017, they held 32%, or $3.8 trillion.

It marks a new phase of consolidation in the banking industry, one driven first by the acquisitions and then by customers’ attraction to the digital tools and ubiquitous locations of the biggest banks.