The Commonwealth Fund Affordable Care Act Tracking Survey, February–April 2016, found that as the number of people in the United States without health insurance has declined since the Affordable Care Act went into effect, the composition of the uninsured population has changed.
According to the report, “Who Are the Remaining Uninsured and Why Haven’t They Signed Up for Coverage?”, white adults now represent a smaller share of the uninsured population and Latinos a larger share. Most of those who still lack coverage are Latino, make less than $16,000 a year, are under age 35, or work for a small business. And half live in one of the 20 states that had not yet expanded Medicaid at the time of the survey. State and federal policies, lower awareness of the health insurance marketplaces, and concerns about affordability and eligibility are the primary reasons people remained uninsured.