My handwavy evaluation of the data says that 3% are "people whose parents moved in with them" - this is based on the "Annual Income" graph which basically botto

My handwavy evaluation of the data says that 3% are "people whose parents moved in with them" - this is based on the "Annual Income" graph which basically bottoms out at 3%. And it's consistent with the Age graph, which also bottoms out around 3% except for people above 53 (53+30=83, so a lot of those parents are in a high-mortality age). So just subtract 3% from all numbers, where that makes sense of course...