In the 1970s, there was a major influx of Afro-Colombians into urban areas in search of greater economic and social opportunities for their children. This led to an increase in the number of urban poor in the marginal areas of big cities like Cali, Medellín, and Bogotá. Most Afro-Colombians are currently living in urban areas. Only around 25%, or 1.2 million people, are based in rural areas, compared to 75%, or 3.7 million people, in urban zones. The 1991 Colombian Constitution gave them the right to collective ownership of traditional Pacific coastal lands and special cultural development protections. Critics argue that this important legal instrument is not enough to completely address their social and developmental needs.