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A consumer unit consists of any of the following:

(1) All members of a particular household who are related by blood, marriage, adoption, or other legal arrangements;

(2) a person living alone or sharing a household with others or living as a roomer in a private home or lodging house or in permanent living quarters in a hotel or motel, but who is financially independent;

(3) two or more persons living together who use their incomes to make joint expenditure decisions. Financial independence is determined by spending behavior with regard to the three major expense categories: Housing, food, and other living expenses.

To be considered financially independent, the respondent must provide at least two of the three major expenditure categories, either entirely or in part.

Data are diary-based. Figures prior to 2024 have been taken from previous publications.