 18.8% of residents were under the age of 18; 8.2% were between the ages of 18 and 24; 35.1% were from 25 to 44; 27% were from 45 to 64; and 10.9% were 65 years of age or older.The gender makeup of the city was 48.7% male and 51.3% female.As of the census of 2000, there were 45,054 people, 20,736 households, and 11,031 families residing in the city.