The Affordable Care Act public exchange system did better at retaining existing users this year but had trouble attracting new users.

The Centers for Medicare & Medicaid Services has posted numbers supporting that assessment in a batch of exchange system activity data for the system's open enrollment period for 2017.

About 12.2 million people either had exchange plan coverage in place at the end of the 2017 open enrollment period, or had selected plans and were on track to have coverage in place once they paid their premiums.

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Allison Bell

Allison Bell, ThinkAdvisor's insurance editor, previously was LifeHealthPro's health insurance editor. She has a bachelor's degree in economics from Washington University in St. Louis and a master's degree in journalism from the Medill School of Journalism at Northwestern University. She can be reached at [email protected] or on Twitter at @Think_Allison.