Turkey's status as a top regional air hub is reaping billions of dollars in revenue, and those earnings will balloon in the years to come, the state's airport authority has announced.Turkey's revenue from air navigation services in 2015 totaled $1.13 billion, reported the General Directorate of State Airports Authority (DHMI) Thursday.The DHMI said that those funds were received from Eurocontrol, the European Organization for the Safety of Air Navigation.Turkey last year became the number one country contributing to air traffic in Europe, providing over 1.8 million flight navigation services in the country's airspace, according to the DHMI's 2015 annual report.Citing the accelerated traffic growth in Turkish airspace, the DHMI stressed that Turkey had the sixth-largest air navigation market in Europe in 2015."Although there was a huge increase in air traffic, the country did not implement any regulations or limitations on flight activities. We continued our flight control services at the highest level of quality despite the increasing workload," stated the report.