We are the largest private sector airport concession operator in the world based on the number of airports under management and the tenth largest private sector airport operator in the world based on passenger traffic.
We are the largest private sector airport concession operator in the world based on the number of airports under management and the tenth largest private sector airport operator in the world based on passenger traffic. In 2019, our airports served approximately 84.2 million passengers of which approximately 33.5% were international, approximately 56.6% were domestic and approximately 9.9% were transit passengers. The airports we operate are located in countries with compelling macro-economic trends and in key cities within those countries.
From our beginnings in 1998 when we acquired the concession rights to operate 33 airports in Argentina, we have expanded geographically and currently operate 52 airports globally; in Latin America, our largest market, as well as in Europe and Eurasia. We operate some of the largest and most important airports in the countries where we are present; including large international airports, such as Ezeiza Airport in Argentina, domestic airports, such as Brasilia Airport in Brazil, airports in tourist destinations, such as Galapagos Ecological Airport in Ecuador and Florence Airport in Italy, as well as mid-sized domestic airports. We acquired most of our airport concessions through a public tender process and we, generally, improved the infrastructure significantly through large capital investments.
We derive revenue from aeronautical and commercial services. The key driver of revenue is passenger traffic, as increased passenger traffic allows us to generate both aeronautical and commercial revenue. We derive the majority of our revenue from fees charged to departing passengers and landing and parking fees charged to aircraft operators for the use of our premises and for certain aeronautical services. We also earn revenue from commercial services, including warehouse usage, duty free, retail and food and beverage shops, advertising and parking fees.
We have created a global platform with operational expertise and resources to support our organic growth plan and our global expansion strategy.