Write a question about the following article: In 2000 there were 128,925 households in Toledo, out of which 29.8% had children under the age of 18 living with them, 38.2% were married couples living together, 17.2% had a female householder with no husband present, and 40.0% were non-families. 32.8% of all households were made up of individuals and 11.0% had someone living alone who was 65 years of age or older. The average household size was 2.38 and the average family size was 3.04.
Which group for households is smaller: married couples living together or non-families?