'Indian diaspora world's largest'

According to the latest United Nations estimates, 244 million people, or 3.3% of the world's population, live in a country other than the one where they were born.

16 million Indians are scattered across the world, which partly reflects the country's demographic size (1.2 billion) and youth (median age is around 26).

However, immigrants are concentrated in just 20 countries.

By far, the most popular destination in 2015 was the United States, followed by Germany, Russia and Saudi Arabia. But the ranking should not be viewed as a popularity contest. Saudi Arabia shows up because it hosts an enormous number of migrant workers, not immigrants who resettle, as in the United States.

Migrants tend to be mostly young, working-age people, which can be a boon to countries like those in Europe where the native population is swiftly aging. Africans and Asians tend to be the youngest of migrants.