Abolition is the act of formally destroying something through legal means, either by making it illegal, or simply no longer allowing it to exist in any form.
... the town the population is spread out with 25.2% under the age of 18, 5.7% from 18 to 24, 31.9% from 25 to 44, 23.3% from 45 to 64, and 13.9% who are 65 years of age or ...