Only 90,000? I'd have guessed that all San Franciscans were handicapped.
I would agree that most if not all residents of the fine city by the Bay are handicapped. The thing is that only 90.000 or them will admit it. From a city that gives us Sen Feinstein and Speaker Pelosi, should we be at all surprised?
Your guess may be closer to right than wrong.
Consider the facts:
1) SFs total population is 730,000
2) All of them cannot be drivers (under 18, non-drivers, etc.)
3) Many of the criminals and illegal aliens among them don't bother with drivers licenses.
You are right but they are not including the mentally handicapped.