Nathan, "the other 785" are poor people without sufficient funds to rent an apartment. Economic refugees, casualties of our economic system.  However, there is probably a lot of overlap between the mental illness and addiction categories, so the "other" may be more than 785.

"574 chronically homeless people", about 40 percent of the total. The other 60 percent are temporarily homeless.

http://www.lanecounty.org/media/news/pages/pr_hhs_homeless_count_results.aspx