An economic recession triggered by the global oil crisis in the early 1970s followed Germany's economic miracle, and in 1973 the recruitment of foreign workers came to a stop altogether. Between 1961 and 1973, around 2.7 million Turks applied for a job in Germany, but only around 750,000 were actually accepted.
Today, around 2.5 million people with a Turkish background live in Germany, meaning either they or their parents were born in Turkey, making them the largest migrant group in the country. Around 700,000 Turkish migrants have German citizenship. In contrast to citizens of EU countries, Turks cannot have dual citizenship. If they possess both, they must choose between Turkish and German citizenship by their 23rd birthday.