(2nd millennium BC - 1st millennium BC - 1st millennium AD - other millennia)
Significant persons:
Inventions, Discoveries, Introductions
Centuries and Decades
... the population is spread out with 27.2% under the age of 18, 8.7% from 18 to 24, 29.5% from 25 to 44, 21.0% from 45 to 64, and 13.5% who are 65 years of age or older. ...