Monthly premiums for health insurance soared in 2014, the first year of Obamacare’s full implementation, according to a new study.

The report by HealthPocket.com — a site that allows consumers to compare health plans — compared rates from 2013 and 2014. “The analysis of pre- and post-Obamacare health insurance in the individually purchased health insurance market demonstrates a clear increase of average premiums across age groups and both sexes,” researchers found. “While the degree of increase varied by age and sex, the occurrence of an increase did not.”