Air transportation Colombia was a pioneer in promoting airlines in an effort to overcome its geographic barriers to transportation. The Colombian Company of Air Navigation, formed in 1919, was the second commercial airline in the world. It was not until the 1940s that Colombias air transportation began growing significantly in the number of companies, passengers carried, and kilometers covered. In the early 2000s, an average of 72 percent of the passengers transported by air go to national destinations, while 28 percent travel internationally. One notable feature is that after the reforms of the beginning of the 1990s, the number of international passengers tripled by 2003. In 1993 the construction, administration, operation, and maintenance of the main airports transferred to departmental authorities and the private sector, including companies specializing in air transportation. Within this process, in 2006 the International Airport Operator (Opain), a Swiss-Colombian consortium, won the concession to manage and develop Bogotá’s El Dorado International Airport. El Dorado is the largest airport in Latin America in terms of cargo traffic (33rd worldwide), with 622,145 metric tons in 2013, second in terms of traffic movements (45th worldwide) and third in terms of passengers (50th among the busiest airports in the world). In addition to El Dorado, Colombia’s international airports are Palo Negro in Bucaramanga, Simón Bolívar in Santa Marta, Cortissoz in Barranquilla, Rafael Núñez in Cartagena, José María Córdova in Rionegro near Medellín, Alfonso Bonilla Aragón in Cali, Alfredo Vásquez Cobo in Leticia, Matecaña in Pereira, Gustavo Rojas Pinilla in San Andrés, and Camilo Daza in Cúcuta. In 2006 Colombia was generally reported to have a total of 984 airports, of which 103 had paved runways and 883 were unpaved. The Ministry of Transportation listed 581 airports in 2007, but it may have used a different methodology for counting them.. How many more airports were unpaved than paved?