In the next 25 years, the number of residents over 55 is expected to double, to about 1.1 million people.

He said the unemployment rate might double to about 5 percent.

Cover and let rest until it doubles in size, about one hour.

The new mayor should double the level of current city spending, now at about $500 million a year.

The company's stock price has doubled since last June, from about $12 a share to more than $24.

The number of Americans 65 and older will double in the next 25 years to about 72 million, according to government census data.

The population has an annual growth rate of 3.7 percent, doubling about every 19 years.

The result of this is that the marriage rate has caused the population to double about every 30 years.

The number of events has also roughly doubled, to about 500 a year.

With 24,000 inhabitants in 1700, the population doubled about every 30 years.