The largest immigrant groups in Switzerland are those from Germany, Italy, France, the former Yugoslavia, Albania, Portugal and Turkey, including Turks and Kurds. Between them, these six groups account for about 1.5 million people, 60% of the Swiss population with immigrant background, or close to 20% of total Swiss population.[citation needed]
The current federal law of 16 December 2005, on foreigners (the Foreign Nationals and Integration Act) came into force on January 1, 2008, replacing the Federal Act on the Residence and Establishment of Foreigners of 1934.[1]
Switzerland and Australia, with about a quarter of their population born outside the country, are the two countries with the highest proportion of immigrants in the western world, although who counts as an immigrant varies from country to country, and even between agencies within countries. Some countries naturalise immigrants easily, while others make it much more difficult, which means that such comparisons ought to be treated with caution.[2][3][4]
Switzerland also has the highest Potential Net Migration Index of any European country by a large margin, at +150% (followed by Sweden at +78%) according to a 2010 Gallup study; this means that out of an estimated 700 million potential migrants worldwide, about 12 million (150% of Swiss resident population) would name Switzerland as their most desired country of residence.[5] Commonly named reasons for relocation to Switzerland are safety, strong economy, and high quality of education.[6] Another ground for immigrants from developed countries is the relatively favorable personal income tax (up to 11,5%) incorporated in the Swiss taxation system.[6] However, residents with migration background are twice as likely to be unemployed.[7][failed verification]
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: CS1 maint: archived copy as title (link) Based on a poll of close to 350,000 adults in 148 countries answering the question Ideally, if you had the opportunity, would you like to move permanently to another country, or would you prefer to continue living in this country?, if answered in the affirmative followed by To which country would you like to move? [Open-ended, one response allowed.]