In the city, the population was 21.0% under the age of 18, 9.3% from 18 to 24, 44.1% from 25 to 44, 21.0% from 45 to 64, and 4.6% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 111.2 males. For every 100 females age 18 and over, there were 112.4 males. The average income for a household in the city is $101,550. Males had a median income of $77,605 versus $48,116 for females. The per capita income for the city was $29,451. About 1.9% of families and 2.9% of the population were below the poverty line, including 3.2% of those under age 18 and 3.2% of those age 65 or over.