<prompt> Translate the following text to EnglishIdadi ya ukaguzi wa mapato ya chini pia iliongezeka mara mbili baada ya 1990, wakati IRS ilipoanza kuainisha wasiojiandikisha ambao haikuwa na habari juu yao katika jamii ya 25,000 na chini.  <response>: The number of low-income audits also nearly doubled after 1990, when the IRS began categorizing nonfilers about whom it lacked information in the 25,000-and-under category. 