A Latino baby boom is responsible for the growth, especially among Mexican-Americans, who make up 63% of the U.S. Latino population.

Between 2000-2010, the Mexican-American population grew by 7.2 million babies, and 4.2 million immigrants. Mexican migration to the U.S. has declined in recent years for a number of reasons.

One of the major factors driving this shift is age: Mexican-Americans are younger than other groups in the U.S., with a median age of 25 compared to 35 for other groups.