New data from the U.S. Census Bureau presents the most detailed picture yet of the dramatic rise in the number of people covered by health insurance since the Affordable Care Act went into effect.
County-level data going back to 2010, when the law was signed, shows a patchwork of people living without health insurance that ticked down slowly for the first three years under the ACA. But, once the online insurance exchanges opened at the end of 2013 and Medicaid expanded, the population living without coverage dropped noticeably.
The recently released Census report is county-level data for 2015. Overall, the nationwide uninsured rate dropped 7.7 percentage points for people under 65 years old between 2010 and 2015, from 18.2 percent in 2010 to 10.5 percent in 2015.