Demography (noun)

The statistical study of human populations, especially with reference to size, density, distribution, and vital statistics.

Origin:

From the greek words "dēmos" meaning "people" and "graphia" meaning "writing".

Examples:

1. The city's demography was changing rapidly.
2. The study of demography is important for understanding population trends.
3. The demography of the region is diverse.
4. The demography of the country is affected by migration.
5. The demography of the village was affected by the new housing development.