Argentina is the Latin American country where the Argentina’s middle class has grown the most in ten years, doubling in size, according to a report released by the Pew Research Center in the United States. The study shows progress in the region has slowed down since 2010 as a result of the fall in economic growth and export prices. Some countries, however, managed to sail with the tide with Argentina’s middle class going from 15 percent of the total population in 2001 to 32.5 percent in 2011, accounting…