A new report from Pew Research shows some fascinating changes in migration to the United States since 1850.
You may not be surprised to learn that Mexico is the biggest source of U.S. migrants at the moment. But around a century ago there was a smaller wave of immigrants from Europe, with Germany accounting for 18 percent of immigrants in 1910. In those days, Mexicans were only the dominant immigrants in Texas, Arizona, and New Mexico.
And the second-highest number of immigrants nowadays come from China, accounting for 5 percent or 2.2 million people.
There are four states–California, New York, New Jersey, and Florida–where around at least one in five people are from overseas. California peaked in 1860 at 39.7 percent, when China was the top birth country for immigrants there.