householder with no husband present, and 1.4% were non-families. 1.2% of all households were made up of individuals, and 0.2% had someone living alone who was 65 years of age or older. The average household size was 3.29 and the average family size was 3.30. In the base the population was spread out, with 40.2% under the age of 18, 16.5% from 18 to 24, 41.5% from 25 to 44, 1.7% from 45 to 64, and 0.1% who were 65 years of age or older. The median age was 23 years. For every 100 females, there were 103.0 males. For every 100 females age 18 and over, there were 97.5 males. The median income for a household in the base was $34,318, and the median income for a family was $34,659. Males had a median income of $26,322 versus $20,444 for females. The per capita income for the base was $12,119. About 5.2% of families and 4.2% of the population were below the poverty line, including 3.5% of those under age 18 and none of those age 65 or over. Air Mobility Command Museum Hangar 1301 at Dover Air Force Base is home to the Air Mobility Command Museum. The museum is dedicated to military airlift and air refueling aircraft and the people who maintain them. It has a large collection of fully restored cargo and tanker aircraft. Tours are conducted during the day by volunteers, many of whom are retired pilots, navigators, flight engineers and loadmasters who provide first-person narratives of actual events. The hangar encloses over of aircraft display gallery plus of exhibit rooms. An attached building houses a theater, museum store, exhibit workshop, and various offices. A aircraft parking area allows close-up inspection of the outside aircraft. The museum also maintains archives related to the history of the Air Mobility Command and Dover AFB. Building 1301, Dover Air Force Base was added to the National Register of Historic Places in 1994. There are 33 airframes in the collection in 2015, and a staff of more than 170 volunteers. A single battered Douglas C-47A Skytrain, salvaged in 1986 off of a dump at Olmsted Air Force Base, near Harrisburg, Pennsylvania, after being used for target practice, was the museum's modest beginning. Airlifted to Dover AFB by a Pennsylvania National Guard helicopter, "It was the first aircraft restored for the newly conceptualized museum that would form here." Founded as