SF's homelessness is not all home-grown, though. People with minimal resources drift there from across the US because it's amenable, for reasons like: a percept

SF's homelessness is not all home-grown, though. People with minimal resources drift there from across the US because it's amenable, for reasons like: a perception that it is a free-and-easy or at least somewhat accommodating place, the possibility of a chance to improve one's situation among the overall prosperity, a climate that won't kill you, etc. Are there not stats on this?