The behavior is considered normal during the first four years of life, driven by a natural desire that was at some point probably essential to survival.

But it did not hurt the government's approval ratings, which have improved during the last year - driven by increasing optimism about the economy.

Its population has been growing rapidly in recent years, mainly driven by migrant workers coming to the province to work in factories.

Production is up 12.5 percent so far this year, driven in part by surging exports.

Five hundred years of work-had it all been a mad task, driven on by selfish desires and a fool's faith?

The demand for memory chips has surged in recent years, driven mostly by rising sales of personal computers.

I meet various men who have been here for five years, driven from Darfur by the Janjaweed.

Their works have enjoyed a huge boom in price and demand in recent years, driven largely by a new class of Russian collectors.

Latin American stock funds are having a strong year, driven by the privatization of industries and the easing of trade restrictions.

This demand is forecast to double every three years over the course of the next decade, being driven by several factors: