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
Capital Region International Airport led to the building of the current terminal building in 1959. The terminal has had several renovations and additions since then. In April 1967 a new $38,000 observation room opened, where viewers can hear radio communications between pilots and control tower through a loud speaker. In the early 1960s Lansing Community College leased the Francis Aviation Complex at Capital City Airport. The college moved to a new facility near the airport terminal in 1974. In March 1960 Francis Aviation Co. built two circular (roundtable) airport hangars costing $400,000 at the airport, believed to be the world's first. In 1963 Capital