Latin America is a region of the Americas where Romance languages or a subset of the Romance language family – always including Spanish and Portuguese, and sometimes including French – are primarily spoken. Latin America has an area of approximately 21,069,500 km², almost 3.9% of the Earth's surface or 14.1% of its land surface area. As of 2010, its population was estimated at more than 590 million and its combined GDP at 5.16 trillion United States dollars. According to Phelan, the term "Latin America" was first used in 1861 in La revue des races Latines, a magazine "dedicated to the cause of Pan-Latinism".