An estimated 28.8 million U.S. residents, or 9%, lacked health insurance when surveyed in the first six months of 2017, according to a report released last week by the Centers for Disease Control and Prevention. That’s about the same as in 2016, but 19.8 million fewer people than in 2010, the authors said. The uninsured rate for adults under age 65 was 8.8% in Medicaid expansion states, compared with 19% in non-expansion states. The report also includes estimates for various demographic groups and by health insurance marketplace type. Adults under age 65 were more likely to be uninsured in states with a federally-facilitated marketplace (16.1%) than in states with a state-based (8.3%) or partnership marketplace (8.6%).