 The census reported that 319,870 people (98.6% of the population) lived in households, 1,415 (0.4%) lived in non-institutionalized group quarters, and 3,243 (1.0%) were institutionalized.There were 73,174 households, out of which 41,181 (56.3%) had children under the age of 18 living in them, 41,389 (56.6%) were opposite-sex married couples living together, 11,808 (16.1%) had a female householder with no husband present, 6,451 (8.8%) had a male householder with no wife present.There were 4,933 (6.7%) unmarried opposite-sex partnerships, and 556 (0.8%) same-sex married couples or partnerships.