At the beginning of my visiting this forum, some 10 years ago, by this time under the name "Cinkler", I have suggested that, despite the percentage of diagnosed people with AF is usaly several % of the population, the real percentage may be far larger, maybe 10-20% . Some of the forum members have jumped over me (not literally, lol) stating that it is far too much.
If I have understood the speech of prof. Auricchio correctly, the study on the cohort of 10.000 people has shown that this percentage was 40%. So, it seems that there are many more of us, AFibers, but the people are mostly asymptomatic and never get to the point to be aware, that they live with AF. Here the link: