With a population of about 126 million in 2020, Mexico is the 10th most populated country in the world. It is the most populous Spanish-speaking country and the third-most populous in the Americas after the United States and Brazil. Throughout most of the twentieth century Mexico's population was characterized by rapid growth. Although this tendency has been reversed and average annual population growth over the last five years was less than 1%, the demographic transition is still in progress, and Mexico still has a large cohort of youths. The most populous city in the country is the capital, Mexico City, with a population of 8.9 million (2016), and its metropolitan area is also the most populated with 20.1 million (2010). Approximately 50% of the population lives in one of the 55 large metropolitan areas in the country. In total, about 78.84% of the population of the country lives in urban areas, meaning that only 21.16% live in rural areas.