About 950,000 new customers selected a health insurance plan on Healthcare.gov during the special enrollment period (SEP) from Feb. 23 to June 30, and 15 percent of those people signed up during tax season to avoid paying a fee for lack of coverage.

New data from the Centers for Medicare & Medicaid Services (CMS) show that a total of 143,707 individuals took advantage of the tax season SEP, which ran from March 15 to April 30. This was fewer individuals than expected, The Hill notes, which means the Obama administration still has work to do to convince uninsured Americans to sign up for coverage to avoid the fine.