The U.S. public has been split in their views on the Affordable Care Act since the law was enacted in 2010, but what about those Americans who actually buy their health insurance through the federal program’s marketplaces?

Although most Obamacare participants give high marks to their health coverage, a growing segment of ACA exchange users has expressed frustration with rising costs and what they see as a shortage of plan options. According to the Henry J. Kaiser Family Foundation, the share of Obamacare enrollees who are dissatisfied with their plans rose from 14 percent in 2014 to 29 percent in 2016.

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