Which city sees its population increase by about 1,000% one month each year?

As a result of the increasing amount of employment opportunities and innovation occurring in the city, the city of Mumbai saw a significant rise in their population in only a year, due to the fact that people were migrating to take advantage of the arising opportunities.

Explanation:

representative government

food and resources were plentiful.

women were encouraged to marry later in life so they could work in factories.