The percentage of uninsured adults has risen in the first two quarters of 2017, according to a new Gallup poll. Standing at 10.9 percent in the third and fourth quarters of 2016, the percent of adults without health insurance rose to 11.3 in the first quarter and to 11.9 in the second quarter of this year.

The biggest jump in uninsured, according to the survey, was found in the young adult population. The uninsured rate for young adults 18-25 rose 1.9 percent this year and for those 26-34 1.5 percent. Many found it cheaper and more practical to pay the tax penalty than buy insurance, Gallup speculated.

Factors influencing the drop include rising premiums, insurers dropping out of the Obamacare marketplace, and uncertainly over the future of the Affordable Care Act (ACA), which Republicans have vowed to “repeal and replace.”