This number was expected to double during the 1999-2000 school year.

The population more than doubled from 4000 to 9000 during the 19th century.

The population of the county more than doubled during the 1920s.

The points were doubled during the last two minutes of the round.

The price will double to 50 cents during the week.

A human child's brain doubles during the first year of life.

His work showed that crime more than doubled during those years.

The number of businesses in the area doubled during the same period.

Wikidot.com has roughly doubled in size during the last year.

Due to this the population of many islands can double or more during the summer.