Task: Question Answering
Input (English): Passage: 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.In June 2012, President Obama issued a memorandum instructing officers of the federal government to defer deporting young undocumented immigrants who were brought to the U.S. as children as part of the Deferred Action for Childhood Arrivals (DACA) program.  Under the program, eligible recipients who applied and were granted DACA status were granted a two-year deferral from deportation and temporary eligibility to work legally in the country. Among other criteria, in order to be eligible a youth applicant must (1) be between age 15 and 31; (2) have come to the United States before the age of 16; (3) have lived in the U.S. continuously for at least five years; (4) be a current student, or have earned a high school diploma or equivalent, or have received an honorable discharge from the U.S. armed services; and (5) must not "have not been convicted of a felony, significant misdemeanor, or three or more misdemeanors, and do not otherwise pose a threat to public safety or national security." The Migration Policy Institution estimated that as of 2016, about 1.3 million unauthorized young adults ages 15 and older were "immediately eligible for DACA"; of this eligible population, 63% had applied as of March 2016.Children of legal migrants won't qualify as Dreamers under DACA protection because they entered the country legally. This is highlighted as the biggest contradiction in US immigration policy by many advocates of legal immigrants. 
Question: What ages does an immigrant need to be between to be able to apply for DACA status in the country where unauthorized workers make up 5% of the labor force?
Output (English): 15.