Bolivia is traditionally regarded as a highland country. Although only one-third of its territory lies in the Andes Mountains, most of the nation’s largest cities are located there, and for centuries the highlands have attracted the nation’s largest amount of mining, commercial, and business investment. In the late 20th century, however, the demographic and economic landscape began to change as the eastern lowlands—particularly the department of Santa Cruz—developed rapidly. Most of the Bolivians (70%) live in urban areas. Bolivia is home to the largest indigenous population in Latin America followed by Guatemala and Peru. There are also 36 indigenous languages recognized in Bolivia but the four languages Spanish, Quechua, Aymara and Guarani are the most used official languages.