• Among those who report living in firearm-owning households, 25% have one or more loaded and unlocked firearms in their home.
• Overall, nearly one-in-ten Americans (9%) live in a household with one or more loaded and unlocked firearms in their home
I suspect it's way more than one-in-ten.
Gun folk tend to be shy about sharing their practices with pollsters.
BTW: The study deems "loaded and unlocked" as being an unsafe storage practice. I'd say the study is making some assumptions, showing some prejudice there.