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
Music in Paris of Jacques Offenbach, but the genre nearly disappeared in the 20th century, due in large part to high costs and to competition from motion pictures. In the 1980s and 1990s, Paris reversed the trend hosted the premieres of two mega-musicals, "Les Miserables", based on the novel by Victor Hugo, with music by Claude-Michel Schönberg and original French lyrics by Alain Boublil and Jean-Marc Natel, opened in Paris in 1980, and "Notre Dame de Paris", also based on a novel by Victor Hugo, with music composed by Riccardo Cocciante and lyrics by Luc Plamondon, which opened on September 16, 1998. Both