70% from San Francisco
22% from rest of California
8% from out of state
Also, the data disagrees with the general sentiment of "Mental Health" issues amongst Homeless people. Only 5% were homeless because of mental health problems. Most of them, almost a quarter are homeless because they lost their job.
Basically, many things in this report goes against the general opinion of people of the Bay Area. Misinformed public leads to misinformed decision making and policies.
Responding to GP:
> I don't think the mess in San Francisco is entirely due to local policies. I think the nation as a whole needs substantially more affordable housing.
This is wrong. It is precisely due to the policies of SF city. The sooner people realize and accept the faults of San Francisco city's governance, the better it will be for the city. Same lessons can be applied to Portland (used to be ranked 3rd in the nation according to Oregonian, now it is ranked a whopping 66th out of 80), Seattle, and Los Angeles.
To OP - thank you for the link, it's illuminating.