The average American family consists of 3.14 people, according to the most recent U.S. census. The average household: 2.58. So it’s a little odd that the market for seven-passenger SUVs is heating up. Americans, it seems, are feeling comfortable enough about the economy that they are once again up-sizing.

Later this month, Hyundai will introduce a new three-row version of its Santa Fe, and Ford will soon offer its popular Transit Connect delivery van as a seven-passenger Mom-mobile. But Mazda is getting a jump on the competition with a refreshed version of its CX-9.

If family size is a function of wealth, it makes sense that Mazda’s largest vehicle is also its most premium and its most expensive, catering to well-educated families making at least $100,000 who can afford to drop at least $30,000 on a car and fists full of cash every time they fill up the tank.