• Were in immigrant detention in 2018 (TRAC 2019d). This data covers only a fraction of the persons encountered by US immigration and refugee programs each year. The combined number of US asylum seekers, persons in removal proceedings, and immigrant detainees who are potentially stateless or potentially at risk of statelessness over a multi-year period represent only a small fraction of the 181 million non-immigrants admitted in FY 2017 (Navarro 2018). Researchers cannot make assumptions about the size of the overall US stateless population from these smaller samples. The report presents this data – which suggests a diverse and not insubstantial stateless population – for information purposes, not to contribute to the stateless estimates. Thus, between 2001 and 2018, 1,985 persons in removal proceedings listed their nationality as “stateless” (meaning “unable to name a country” of nationality), 961 were listed of “unknown” nationality, and 84 of “no nationality” (TRAC 2019a). Stateless persons were also likely included among those listed as from the Soviet Union (6,113), Yugoslavia (3,595), and Palestine (682) during these years. Table 4 presents annual counts of deportation proceedings initiated in immigration courts by DHS between 2001 and 2018. Attachment D shows the annual numbers of persons in deportation proceedings of the selected nationalities by outcome and custody status. Table 4. Persons in deportation proceedings in immigration court Fiscal Year Case Began 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 64 StatelessAlien Unable to Name Country 70 132 164 160 162 109 154 217 205 127 101 65 43 38 45 Unknown No Nationality 22 22 18 13 17 27 58 92 93 51 51 76 85 76 51 8 14 15 12 17 6 7 1 0 0 0 1 0 0 0 Soviet Union 7 13 250 545 511 352 389 242 344 421 416 356 331 219 202 Yugoslavia 672 517 401 360 224 162 253 208 177 127 108 72 68 63 40 Palestine 29 38 39 22 34 40 55 61 59 26 38 24 28 30 23