If you wish to believe leftist liberal groups like the "
National Alliance to End Homelessness", there are 671,859 homeless people in the United States.
The
US population is 310,686,344.
Therefore, 0.2162% of the US population is homeless, not the 0.85% you show in your San Francisco example. If your example applied to the entire country, there would be 2,668,472 homeless people in the US.
With a little more "help" from Obama, we just might reach or exceed that number in the coming months.