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
Ishigaki Airport Ishigaki Airport , was a third-class airport located from Ishigaki city centre in Okinawa Prefecture, Japan. The airport provided flights to major cities on the Japanese mainland as well as destinations throughout Okinawa Prefecture and the Yaeyama Islands. Commercial operations at Ishigaki Airport ceased at midnight on March 6, 2013, and New Ishigaki Airport opened on March 7, 2013. As of mid-2013, the possibility exists that the airport may be turned over fully to the Japanese Self-Defense Forces. As a "Type-3" airport, the JSDF was already in theory able to carry out operations from Ishigaki. The airport was opened in