Pew Research Center, in a Sep. 28, 2015 report, "Modern Immigration Wave Brings 59 Million to U.S., Driving Population Growth and Change through 2065," available at pewhispanic.org, stated:

“Fifty years ago, the U.S. enacted a sweeping immigration law, the Immigration and Nationality Act, which replaced longstanding national origin quotas that favored Northern Europe with a new system allocating more visas to people from other countries around the world and giving increased priority to close relatives of U.S. residents.

Just prior to passage of the 1965 law, residents of only three countries—Ireland, Germany and the United Kingdom—were entitled to nearly 70% of the quota visas available to enter the U.S. Today, immigration to the U.S. is dominated by people born in Asia and Latin America, with immigrants from all of Europe accounting for only 10% of recent arrivals.”

Sep. 28, 2015