Question: Many immigrants move to the united states each year. where do most immigrants come from today?
qaPairs: question: Many immigrants move to the united states each year. Which country do most immigrants come from in 2017?
answer: Mexico
question: Many immigrants move to the united states each year. Which country do most immigrants come from in 2016?
answer: Mexico
question: Many immigrants move to the united states each year. Which country do most immigrants come from in 2015?
answer: Mexico