According to his estimates, the stock could double in the next 18 months.

The population has doubled in the last 15 months.

That number is expected to double in the next few months.

The Swedish company also reported that its earnings had more than doubled in the first six months of 1989.

Foreign exchange reserves have doubled in the last 15 months.

He now has 16 employees and hopes to double his work force in the next 18 months.

The price has more than doubled in the last six months alone.

With interest rates having doubled in the past 18 months, the pressure is on.

He expects both figures to double again in the next 12 to 18 months.

The stock has doubled in the last 12 months.