The large groups of foreign-born guest workers in the Gulf Cooperation Council states, for example, have no right to citizenship no matter the length of their residence.
Certain countries have intermediary rules: in Germany and Japan it is often difficult but not impossible for the foreign born to become citizens.
The adjective foreign-born has two potential meanings: The United Nations uses the first definition to estimate the international migrant stock, whenever this information is available.
Countries with immigration rates above 25% tend to be wealthy countries with relatively open migration or labour laws, including Singapore, Australia, New Zealand, Switzerland and the Persian Gulf states.
However, estimates for specific immigrant communities can be found, which are as follows: 8.4% - 10% Indians (i.e., Muhajirs from India and their descendants),[18] 1.6% - 2% Afghans,[19] 1% Bengalis,[20] 0.1 - 0.2% Burmese[21][22]