Source: trust me bro.

Worse actually, I found the site, no raw data and it says "study is based on online survey responses from 2,034 Americans ages 18+ fielded by The Harris Poll from August 7 to August 14, 2023, and using data from the Empower Personal Dashboard™. The survey is weighted to be nationally representative on the following dimensions: age, gender, education, race, region, income, size of household, marital and employment status".

So really based on their customer data and however they adjusted the data to be nationally representative.