Obamacare’s insurance regulations contributed to premiums doubling over the course of four years, finds a new federal report.

The findings, assembled by the Health and Human Services Office of the Assistant Secretary for Planning and Evaluation, show that since 2013, one year before the Obamacare regulations were fully implemented, premiums have risen from an average of $2,784 in 2013 to $5,712 in 2017 on the federal exchange, healthcare.gov. This represents an increase of $2,928, or 105 percent.