Passage: In 2000, the Census estimated at least 1,408 same-sex households in Milwaukee, or about 0.6% of all households in the city. Gay-friendly communities have developed primarily in Walker's Point, but also in Bay View, Historic Third Ward, Washington Heights, Riverwest, and the East Side. In 2001, Milwaukee was named the #1 city for lesbians by Girlfriends magazine.The city's population is spread out with 28.6% under the age of 18, 12.2% from 18 to 24, 30.2% from 25 to 44, 18.1% from 45 to 64, and 10.9% who are 65 years of age or older. The median age is 31 years. For every 100 females, there are 91.6 males. For every 100 females age 18 and over, there are 87.2 males.

Question: What is the median age of Milwaukee's population?
31