Uninsured Population Rose in 2018: click here. Dec. 7, 2018.The Henry J. Kaiser Family Foundation The marked gains in health insurance coverage made since the passage of the Affordable Care Act (ACA) in 2010 are beginning to reverse, according to new findings from the latest Commonwealth Fund ACA Tracking Survey. The uninsured rate among working-age people — that is, those who are between 19 and 64 — is at 15.5 percent, up from 12.7 percent in 2016. For more