In 1500, there were about 1.5 million Indians living in North America (about 40 million Indians in the same period throughout the continent, and most of them were in Central and South America). The composition of these indigenous peoples varies greatly in terms of heredity, language and society. It is estimated that there were at least 400 unrelated and distinctive cultural forms north of the Grand River (Rio Grande del Norte) in the 15th century, with a variety of human body types and language families.steel coil manufacturers
According to the 1980 census, there were 1361,000 American Indians, accounting for only 0.6% of the American population. Living on more than 200 reserves in 26 states.
Over the past 20 years, more than 200,000 Indians have left the reserve and migrated to major cities to make a living. In today’s United States, Indians are still among the most economically impoverished ethnic minorities, with the lowest number of employees, the lowest level of health, education and income, and the worst living conditions.