As more and more people are on the move today than at any other point in human history, migration is considered one of the defining global issues of the early twenty-first century, Currently about 192 million people live in a country which was not their place of birth, making up roughly three per cent of the world's population.
This means that roughly one out of every thirty-five persons in the world is a migrant. Between 1965 and 1990, the number of international migrants increased by 45 million - an annual growth rate of about 2.1 per cent. The current annual growth rate is about 2.9 per cent.