Cuitláuac was the Aztec ruler of the city of Tenochtitlan for a few weeks. He was elected before the death of Moctezuma II, because Moctezuma II was being held prisoner by the Spanish. Cuitlauac died of smallpox.
... out with 28.2% under the age of 18, 7.5% from 18 to 24, 33.5% from 25 to 44, 23.9% from 45 to 64, and 6.9% who are 65 years of age or older. The median age is 34 years. ...