ocr: The majority of Colombians are people of mixed blood. An estimated - 450,000 indigenous Amerindians are largely concentrated in the southwest and Amazonia, although some communities are scattered throughout the country. A small black population lives along both coasts, and especially in Choco, Colombia's poorest region. Blacks are the most underrepresented group. Some progress has been made in giving Amerindians a greater political voice. In 1991, constitutional reforms reserved two seats in the Senate for indigenous representatives, and Amerindian pressure groups are increasingly active. Howe ...