Nevada has the highest proportion of illegal immigrants of any U.S. state, at 7.6 percent of its population, and the number of illegal immigrants nationwide is leveling off at about 11.2 million, according to a study released on Tuesday.

The study, by the Pew Research Center, looked at U.S. illegal immigrant population trends over a three-year period ending in 2012.

The number of illegal immigrants in Nevada fell by 20,000 over that period, but the state still had about 210,000. California and Texas ranked second and third in the share of illegal immigrants as a percentage of their total population.