Istanbul Atatürk Airport airport was originally named "Yeşilköy Airport". In the 1980s, it was renamed "Istanbul Atatürk International Airport" in honour of Mustafa Kemal Atatürk, the founder and first president of the Republic of Turkey. It served more than 60 million passengers in 2015, making it the 11th-busiest airport in the world in terms of total passenger traffic and the 10th-busiest in the world in terms of international passenger traffic. As of 2017, it is Europe's 5th-busiest airport after London Heathrow, Paris Charles de Gaulle, Frankfurt Airport and Amsterdam Schiphol Airport, having fallen from third place after a decline in passengers due to
Turkey aged 65 years or older make up 7.3 percent. In 1927, when the first official census was recorded in the Republic of Turkey, the population was 13.6 million. The largest city in Turkey, Istanbul, is also the largest city in Europe in population, and the third-largest city in Europe in terms of size. Article 66 of the Turkish Constitution defines a "Turk" as "anyone who is bound to the Turkish state through the bond of citizenship"; therefore, the legal use of the term "Turkish" as a citizen of Turkey is different from the ethnic definition. However, the majority of the