Wales' foreign-born population rises by 82% in 10 years
5 March 2014 Last updated at 13:18 GMT
The number of people coming to live in Wales from outside the UK has soared in the last 10 years.
Researchers from Oxford University analysed population data between 2001 and 2011 which shows the number of people coming to Wales from other countries went up by 82%.
More than 160,000 people living here were born outside the UK - that is just over 5% of the population.
Merthyr Tydfil saw the second largest increase in its migrant population in the UK.
Paul Heaney reports.