I don’t know for sure. But I’ve been alive for 34 years, and I can’t remember a small car seriously challenging either iconic nameplate. The Hyundai Elantra, Nissan Sentra, Volkswagen Jetta and a few others have sold reasonably well, but never enough to knock the Civic and Corolla off the top of the mountain.
Certainly no American car has ever come close. But that was before a series of unfortunate events for one company contributed to the sudden rise of what could be a new American king of the mountain.