from the 9th edition (1880s) of an unnamed encyclopedia
See list of popes.
... is 3.31. In the town the population is spread out with 29.3% under the age of 18, 9.6% from 18 to 24, 30.3% from 25 to 44, 20.9% from 45 to 64, and 9.8% who are 65 ...