[sokoloff]

This would logically be read as "bottom 30% of Americans, ranked by car ownership [rather than net worth or income]". I suspect that there are in fact more than 30% of Americans who own zero cars.

18% of Americans are 14 years old or younger [and presumably almost none of them own a car], so if 15% of those 15 years old or older don't own a car, the total is over 30%.

[pksebben]

Fair point. Even solving for age, I would assume this holds as cities with metros mean roughly 80% of people don't even need a car.

It's still an absurd comparison, as 0% of people don't need money.