The illegal immigrant population of the United States is estimated to be between 11 and 12 million. The population of unauthorized immigrants peaked in 2007 and has declined since that time. The majority of the U.S. unauthorized immigrants are from Mexico, but "their numbers (and share of the total) have been declining" and as of 2016 Mexicans no longer make up a clear majority of unauthorized immigrants, as they did in the past. Unauthorized immigrants made up about 5% of the total U.S. civilian labor force in 2014. By the 2010s, an increasing share of U.S. unauthorized immigrants were long-term residents; in 2015, 66% of adult unauthorized residents had lived in the country for at least ten years, while only 14% had lived in the U.S. for less than five years.