I see how it is

Doesn't just add up, total lifetime rad count is perminant and everything adds to it. Plane flights, X-Rays, living in mountainous areas...
Living and commuting in New York City, passing through Grand Central Station daily probably adds to the count.

I think even being a bannana farmer might be quantifiable.

Actually, your body gets rid of most of the radiation that you're exposed to. Everything around you gives of radiation ex. your desk, chair, couch, etc. One or two x-rays and your body will get rid of it. Too many at once (like an x-ray technician) and that's when the problems begin.

Even daily.

Can confirm any office dentist doctor etc that has an x-rays machine....does x-rays daily. Or its not worth the cost of the machine.