Paris for 31 percent of the GDP of France. According to the Economist Intelligence Unit Worldwide Cost of Living Survey in 2018, Paris was the second-most expensive city in the world, behind Singapore and ahead of Zurich, Hong Kong, Oslo and Geneva. The city is a major rail, highway, and air-transport hub served by two international airports: Paris-Charles de Gaulle (the second busiest airport in Europe after London Heathrow Airport with 69.5 million passengers in 2017) and Paris-Orly. Opened in 1900, the city's subway system, the Paris Métro, serves 5.23 million passengers daily, and is the second busiest metro system in
Gunsan Airport Gunsan Airport Gunsan Airport (, ) is an airport serving Gunsan, a city in the North Jeolla Province in South Korea. In 2011, 172,327 passengers used the airport. It shares its runway with Kunsan Air Base, which uses the same IATA and ICAO codes. The routes between Seoul and Gunsan were opened in August 1970, but the airport was closed in 1974 due to the first oil shock, but the construction of the civil harbor facility started in November 1991 and reopened on December 14, 1992. On December 14, 1992, Korean Air (Korean Air) opened a new route to Seoul,