There are 76 countries that have "unavailable" information, meaning the metric is based off of registered vehicles, somehow. Really, no one drives a car in Cuba? I've been there, and there are cars. Somalia? Well, I watched Black Hawk Down, and they had cars there too. There are far more cars than that number. I've seen the estimate at a billion:

http://www.huffingtonpost.ca/2011/08/23/car-population_n_934...

All that leaving aside the fact that car companies build other things, like heavy equipment and military vehicles.