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It is a biological concept and is important in population ecology,
differentiated from emigration and migration.
There are more than 300 million migrants around the world today.
Europe hosted the largest number of immigrants, with 70.6 million people in 2005,
the latest year for which figures are available.
Most of today's migrant workers come from Asia.
In 2005, there were nearly 191 million international migrants worldwide,
3 percent of the world population.
This represented a rise of 26 million since 1990.
Sixty percent of these immigrants were now in developed countries, an increase on 1990.
Those in less developed countries stagnated, mainly because of a fall in refugees.
Contrast that to the average rate of globalization
(the proportion of cross-border trade in all trade), which exceeds 20 percent.
The numbers of people living outside their country of birth is expected to rise in the future.
It is a biological concept and is important in population ecology,
differentiated from emigration and migration.
There are more than 300 million migrants around the world today.
Europe hosted the largest number of immigrants, with 70.6 million people in 2005,
the latest year for which figures are available.
Most of today's migrant workers come from Asia.
In 2005, there were nearly 191 million international migrants worldwide,
3 percent of the world population.
This represented a rise of 26 million since 1990.
Sixty percent of these immigrants were now in developed countries, an increase on 1990.
Those in less developed countries stagnated, mainly because of a fall in refugees.
Contrast that to the average rate of globalization
(the proportion of cross-border trade in all trade), which exceeds 20 percent.
The numbers of people living outside their country of birth is expected to rise in the future.