Americans like cars. Just how much they do is easier to see with two sets of comparative data (first image, second image).

Several things to note:

1. The United States is toward the top of the list with a number of notable smaller countries. Other large countries tend to be further down the list (except for Italy).
2. It is interesting that the number of vehicles per person is so high in many countries that have smaller populations and a smaller land area. In the United States, cars often seem necessary because it is a big country and the population is spread out. (This would be interesting to measure exactly: before the widespread popularity of cars, was the dispersion of the American population significantly different from other countries? This would help get at whether the car caused greater American sprawl or Americans had already spread out and it only accelerated with the availability of cars.)
3. Having higher levels of wealth seems to be at least slightly connected to higher rates of car ownership. However, this is not necessarily a strong relationship. In other words, different wealthy countries have different approaches to vehicles. Compared to the United States, the other G7 members are far down the list.