Nearly 8.3 million people selected a 2016 health plan through the federally-facilitated Health Insurance Marketplace between Nov. 1 and Dec. 19, the Centers for Medicare & Medicaid Services announced yesterday. About 71% of the plan selections were by 2015 enrollees who were renewing coverage or selecting a new plan for 2016; the rest did not have current Marketplace coverage. Enrollees in 2016 plans are nearly twice as likely to be under age 35 as enrollees a year ago, the agency said. Open enrollment for 2016 runs through Jan. 31. As of Sept. 30, about 9.3 million Americans had an active policy through the federal or state-based Health Insurance Marketplaces, CMS said.