"Among married-couple households, about 13 percent consisted of families with children in which only the husband worked, 31 percent were dual-income families with children, 25 percent were dual-income families with no children, and 31 percent consisted of other types of families, such as older married couples whose children no longer reside in the household."
https://www.prb.org/resources/traditional-families-account-for-only-7-percent-of-u-s-households/