 For every 100 females age 18 and over, there were 107.5 males.There were 4,521 housing units at an average density of 161.8 per square mile, of the occupied units 2,471 (58.4%) were owner-occupied and 1,759 (41.6%) were rented.The homeowner vacancy rate was 2.2%; the rental vacancy rate was 6.9%.9,552 people (56.2% of the population) lived in owner-occupied housing units and 6,771 people (39.9%) lived in rental housing units.