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
Sendai Airport 1994, which was followed by services to Shanghai and Changchun. In 1992, Runway 09/27 was extended further to and 5 years later, in 1997, a new terminal was opened. The Sendai Airport Line rail link was completed on 18 March 2007 and began service between and Sendai Airport Station. The "Smile Terrace" observation deck opened on 19 March 2010. On 11 March 2011, the airport was first damaged by the 2011 Tōhoku earthquake and then badly flooded by the subsequent tsunami. In addition to submerging the tarmac, taxiways and runway, the floodwaters reached up to parts of the 2nd level