Based on population growth, the economy doubled every 250,000 years from the Paleolithic era until the Neolithic Revolution.

Following statehood in 1836, the population doubled each decade until the 1870 Census conducted following the Civil War.

They said the number of recycling programs would have to double each year from now until 1995 to meet the goal.

Historically, U.S. demand for electricity almost doubled every decade from 1900 until the nineteen-seventies.

From about 1,000 inhabitants in 1938 the population of the city increased to 25,000 in 1950 and doubled to 50,000 until 1958.

Government annual funding was doubled in the years up to 1850 and doubled again until 1860, and the municipal funding also showed strong growth.

He doubled as proprietor and principal of the school until 1973.

Balls that were hit over the fence were counted as doubles until 1884, when they became home runs.

A low dose is used initially, then doubled for the remaining doses until delivery.

The single line between Hatton and Bearley was not in fact doubled until 1939.