It's unclear from that article what "ownership" means, given that a kettle is a household-level item, I'm not sure if it would matter if you did your survey as "do you own a kettle" or "is there a kettle in your house" -- they should sum up to about the same percentage. Maybe a smaller percentage of the population would say they own a kettle than would say they have one in their house due to different interpretations of what it means to "own" something. I'd expect those differences to be within the margin of error of most surveys.

Sure, but I was surprised by how low the figure was. I would have expected it to be more like 90-95%.