California Auto Woes: New-Vehicle Registrations Fall for 3rd Year, -9.5% from 2016. Bay Area Hit Hardest. Q4 Was Ugly, with Tesla Plunging 46%. But Used-Vehicle Market Grows by Wolf Richter • Feb 21, 2020 • 174 Comments Market share of EVs reaches 5.3%. The registrations data is out in all its glorious detail.