Romani people, or Roma (Serbian: Роми, romanized: Romi), are the third largest ethnic group in Serbia, numbering 147,604 (2.1%) according to the 2011 census. However, due to a legacy of poor birth registration and some other factors, this official number is likely underestimated. Estimates that correct for undercounting suggest that Serbia is one of countries with the most significant populations of Roma people in Europe at 250,000-500,000. Anywhere between 46,000 to 97,000 Roma are internally displaced from Kosovo after 1999.