The 50% stat is talking about metro areas, not city boundaries. That is, what people on the ground would use to describe in a city vs. the legal borders. So, f

The 50% stat is talking about metro areas, not city boundaries. That is, what people on the ground would use to describe in a city vs. the legal borders. So, for instance, Greater Los Angeles has more than 18 million people by itself, where your source lists it as under 4 million. https://en.wikipedia.org/wiki/Greater_Los_Angeles https://en.wikipedia.org/wiki/Greater_Los_Angeles