 23.6% of residents were under the age of 18; 7.8% were between the ages of 18 and 24; 21.5% were from 25 to 44; 29.9% were from 45 to 64; and 17.2% were 65 years of age or older.The gender makeup of the city was 47.3% male and 52.7% female.As of the census of 2000, there were 18,670 people, 7,151 households, and 5,070 families residing in the city.