Population Bulletin, Vo. 63, No. 1, March 2008 – Managing Migration: The Global Challenge, by Philip Martin and Gottfried Zürcher.
“The number of international migrants is at an all-time high. There were 191 million migrants in 2005, which means that 3 percent of the world’s people left their country of birth or citizenship for a year or more.1 The number of international migrants in industrialized countries more than doubled between 1985 and 2005, from almost 55 million to 120 million. However, most of the world’s 6.6 billion people never cross a national border; most live and die near their place of birth. Those who cross national borders usually move to nearby countries, for example, from Mexico to the United States, or from Turkey to Germany. The largest flow of migrants is from less developed to more developed countries (see figures). In 2005, 62 million migrants from developing countries moved to more developed countries, but almost as many migrants (61 million) moved from one developing country to another, such as from Indonesia to Malaysia. Large flows of people also move from one industrialized country to another, from Canada to the United States, for example, and much smaller flows move from more developed to less developed countries, such as people from Japan who work in or retire to Thailand.”
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