The migration has contributed to a growing slum-dwelling population.

Increased migration from rural areas contributed greatly to the growth of this class.

In addition large rural-urban income differentials and massive urban migration contributed to a very unstable situation from about 1962-70.

In such circumstances and in the absence of a rise in fertility rates, migration will contribute more to population growth than natural increase.

Immigration would then be roughly balanced with emigration and net migration would no longer contribute to our population growth.

In addition to economic growth, migration of workers to other EU countries also contributed to this reduction.

In this country, free and easy migration over a vast continent contributed to our social stability.

The migration of skiiled labor has contributed to the brain drain that is affecting many African nations.

Since the 1980s, net migration has generally been positive, and has contributed more to population growth than natural change.

The colonization and migration contributed to the mixture of flavors and dishes in the state.