The US emerged as the largest remittance source country with an estimated USD 56 billion in outward flows in 2014.

In outward flow, the US was followed by Saudi Arabia (USD 37 billion), and Russia (USD 33 billion) in 2014, the Bank said in the report.

Noting that the number of international migrants is expected to surpass 250 million this year, an all-time high, as people search for economic opportunity, the Migration and Remittances Factbook 2016 said the fast growing developing countries have increasingly become a strong magnet for people from other parts of the developing world.

International migrants will send USD 601 billion to their families in their home countries this year, with developing countries receiving USD 441 billion, the report produced by the World Bank Group's Global Knowledge Partnership on Migration and Development (KNOMAD) initiative said.

The top 10 migrant destination countries are the US, Saudi Arabia, Germany, Russia, the UAE, UK, France, Canada, Spain and Australia.

The top 10 migrant source countries are India, Mexico, Russia, China, Bangladesh, Pakistan, the Philippines, Afghanistan, Ukraine, and UK.

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