We believe the following strengths allow us to compete effectively:
Disciplined Operating Philosophy. We generated operating income and net income attributable to Cinemark Holdings, Inc. of $392.3 million and $264.2 million, respectively, for the year ended December 31, 2017. Our solid operating performance is a result of our disciplined and consistent operating philosophy that centers on building new, and reinvesting in our existing, high-quality theatres, focusing on the guest experience and maintaining favorable theatre-level economics, controlling operating costs and effectively reacting to economic and market changes.
Leading Position in Our U.S. Markets. We have a leading market share in most of the U.S. markets we serve, which includes a presence in 41 states. For the year ended December 31, 2017, we ranked either first or second, based on box office revenues, in 19 out of our top 25 U.S. markets, including the San Francisco Bay Area, Dallas, Houston, Salt Lake City, Sacramento, Cleveland, Austin and Las Vegas.
Located in Top Latin American Markets. We have successfully established a significant presence in major cities in Latin America, with theatres in fourteen of the twenty largest metropolitan areas in South America. As of December 31, 2017, we operated 194 theatres and 1,398 screens in 15 countries. Our international screens generated revenues of $769.4 million, or 25.7% of our total revenues, for the year ended December 31, 2017. We are the largest exhibitor in Brazil and Argentina and have significant market presence in Colombia, Peru and Chile. Our geographic diversity makes us an important distribution channel for the movie studios.
State-of-the-Art Theatre Circuit. We offer a state-of-the-art movie-going experience, which we believe makes our theatres a preferred destination for moviegoers in our markets. During 2017, we built 66 new screens worldwide. As of December 31, 2017, we had commitments to open 197 additional new screens over the next three years. We have installed digital projection technology in all of our worldwide auditoriums. We currently have 15 digital IMAX screens. As of December 31, 2017, we had the industry-leading private label premium large format circuit with 242 XD auditoriums in our theatres. We have plans to install additional XD auditoriums during 2018. We also continue to develop new market-adaptive theatre concepts in various markets. We believe we offer the brightest picture in the industry, with our Doremi servers and Barco digital projectors, and custom surround sound in our auditoriums. We have also established a centralized theatre support center that monitors and responds to projection performance and theatre network connectivity issues across our worldwide circuit on a real-time basis.
Disciplined and Targeted Growth Strategy. We continue to grow organically as well as through the acquisition of high-quality theatres in select markets. Our growth strategy has centered around exceeding our return on investment thresholds while also complementing our existing theatre circuit. We continue to generate consistent cash flows from operating activities, which demonstrates the success of our growth strategy. We believe the combination of our strong balance sheet and our continued commitment to taking advantage of accretive growth opportunities, will continue to provide us with the financial flexibility to pursue further expansion opportunities and maintain our existing locations at a high standard, while also allowing us to effectively service our debt obligations and continue to offer our stockholders a strong dividend yield.
Experienced Management. Led by Chairman and founder Lee Roy Mitchell, Chief Executive Officer Mark Zoradi, Chief Operating Officer and Chief Financial Officer Sean Gamble, and President-International Valmir Fernandes, our operational management team has many years of industry experience. Each of our international offices is led by general managers that are local citizens familiar with cultural, political and economic factors impacting each country. Our worldwide management team has successfully navigated us through many industry and economic cycles.
We believe our disciplined operating philosophy and experienced operational management team will enable us to continue to enhance our leading position in the motion picture exhibition industry. Key components of our strategy include: