according to analysis of the 2010 united states census, "immigrants to the united states are significantly less likely than native-born citizens to be incarcerated. the authors found that 1.6 percent of immigrant males age 18-39 are incarcerated, compared to 3.3 percent of the native-born... the divide was even sharper when the authors examined the incarceration rate among immigrant men the authors believe likely to be undocumented — specifically less-educated men from el salvador and guatemala between age 18-29. ... according to the analysis, these likely undocumented immigrants had an incarceration rate of 1.7 percent, compared with 10.7 percent for native-born men without a high school diploma".