Garbage in garbage out. A poll is not fact
Opinion polls are no longer OPINION polls. I remember when the results of a poll said “26% INCORRECTLY answered that Obama is a muslim”. How can an opinion be incorrect? That would be like saying “47% of those polled incorrectly said they wanted Romney to be president”.
As for this poll, they have no ideal how many people are insured. They simply know how many the government TOLD them had signed up.