4a . To Make a Nation: How Immigrants are Changing America by Penny Loeb, Dorian Friedman, Mary C. Lord, Dan McGraw and Kukula Glastris

4a. Can you interpret the graph of 1990 U.S. Immigration Census Profile. Here are the questions? What does each bar represent? Which country was the source of the greatest number of immigrants? And Although Mexico's bar looks huge in the graph, what percentage of the 8.6 million total imigrants actually came from that country?