From this report
I’ll note that California is a bit unusual, having imposed energy efficiency standards on buildings decades ago (much of the US didn’t) and having actively taken steps to substitute solar, wind, and storage for fossil-fuel based electric generation
25% of all vehicles sold, and 4% of vehicles on the road in 2022. Considering the continued growth it’s likely higher by now. That’s not a huge number but it’s starting to be enough to bring emissions down, especially in combination with the decarbonization of the electric grid.
However, I agree that the best and easiest solution is to move away from the private automobile as the main mode of transit.