The U.S. DOE’s Office of Energy Efficiency & Renewable Energy reports, using Ward’s Automotive data for the year 2018, that in total about 11 million cars were produced in the U.S. across 14 different states.
Tesla's result of 254,530 translated to a 2.3% share out of total production.
We assume that in 2019 the share improved to over 3% and hopefully in 2020 will move above 4%.
Michigan turns out to be responsible for almost one-fifth of the overall results - so let's hope that with the new wave of BEVs, the volume will be gradually electrified.
"The United States produced about 11 million vehicles in 2018. Michigan produced nearly 19% of those, followed by Indiana, Kentucky, and Ohio, which each produced over 10%. While those four states accounted for just over half (52.6%) of all vehicle production, the remainder was produced by 10 other states, mostly in the Southeast or Midwest. California was the only western state to produce vehicles and accounted for 2.3% of total production."
Source: Ward’s Automotive.