How many of the homeless people in SF are from other parts of the US and are given one-way bus tickets to SF by their own hometowns? Because just giving them mo

How many of the homeless people in SF are from other parts of the US and are given one-way bus tickets to SF by their own hometowns? Because just giving them money could only possibly make that problem worse. (Yes, this is a real thing that happens, though I'm not sure the extent. See https://www.theguardian.com/us-news/ng-interactive/2017/dec/20/bussed-out-america-moves-homeless-people-country-study https://www.theguardian.com/us-news/ng-interactive/2017/dec/... )