A History of Immigration to the USA in One Graph

The impact of the immigration probably depends on the size of the existing population, the size of the economy, who the immigrants are, and rates of change in population and economy. With falling birth rates and an aging population, more young immigrants are probably a good idea. Were the economy growing faster and the unemployment rate lower, we might be more accepting of poor and middle class immigrants; as it  is, we should be looking for more immigrants who can help grow our economy and create employment.