I still don't understand your numbers -- you currently say (630pm pst)

> fewer than 88% [EDIT: 80%] of taxi medallions were owner operated

while the source for the wikipedia page [1] says

> Only around 18 percent of cabs are owner-operated, putting most medallions in the hands of big taxi fleets or brokers who simply rent them out.

[1] https://web.archive.org/web/20120727153845/http://www.slate....

[1] https://web.archive.org/web/20120728173548/http://www.slate....