Dividing the number of cars made domestically by the number of cars sold here provides the US auto production percentage. Tesla wins as it exports almost half its cars so its percentage is 196%. BMW follows at 116%, then Ford at 96%, Daimler at 86%, GM at 83%, Honda at 81%, and Fiat-Chrysler at 69%. At 30%, Volkswagen looks very vulnerable to a Trump Tweet calling for more domestic employment.