sentences:  Non-family households accounted for 31.9 percent of total households, and 86.8 percent of them were occupied by someone living alone.People 65 years and older, living alone, accounted for 40.1 percent of non-family households—or 12.8 percent of all types of households.In terms of age distribution, 22.8 percent of the population were under the age of 18, and 21.6 percent were 62 years of age or older.