A new study of public opinion on the Patient Protection and Affordable Act (PPACA) suggests the landmark health law is more popular than is generally assumed.

The analysis that was published in Health Affairs is based on polling data from the first four years after the PPACA was adopted by Congress in 2010, so the only post-implementation data it includes comes from the first few months after the law went into effect at the end of 2013.

Lawrence Jacobs, a professor at the Humphrey School of Public Affairs at the University of Minnesota, conducted the analysis by polling the same group of 1,200 people in 2010, 2012, and 2014 to see if and how people’s opinions about the law would change.