the 2010 census, up from 38,000 in the last Soviet census of 1989. Most Tajiks came to Russia after the dissolution of the Soviet Union, often as guest workers in places like Moscow and Saint Petersburg or federal subjects near the Kazakhstan border. There are currently estimated to be over one million Tajik guest workers living in Russia, with their remittances accounting for as much as half of Tajikistan's economy. Pakistan There are an estimated 220,000 Tajiks in Pakistan as of 2012, mainly refugees from Afghanistan. During the 1990s, as a result of the Tajikistan Civil War, between 700 and 1,200 Tajikistanis arrived in Pakistan, mainly as students, the children of Tajikistani refugees in Afghanistan. In 2002, around 300 requested to return home and were repatriated back to Tajikistan with the help of the IOM, UNHCR and the two countries' authorities. Genetics A 2014 study of the maternal haplogroups of Tajiks revealed substantial admixture of West Eurasian and East Eurasian lineages, and also the presence of South Asian and North African lineages, as well. West Eurasian maternal lineages included haplogroups H, J, K, T, I, W and U. East Eurasian lineages included haplogroups M, C, Z, D, G, A, Y and B. South Asian lineages detected in this study included haplogroups M and R. One lineage in the Tajik sample was assigned to the North African maternal haplogroup X2j. The dominant paternal haplogroup among modern Tajiks is the Haplogroup R1a Y-DNA. ~45% of Tajik men share R1a (M17), ~18% J (M172), ~8% R2 (M124), and ~8% C (M130 & M48). Tajiks of Panjikent score 68% R1a, Tajiks of Khojant score 64% R1a. The high frequency of haplogroup R1a in the Tajiks probably reflects a strong founder effect. According to another genetic test, 63% of Tajik male samples from Tajikistan carry R1a. An autosomal DNA study by Guarino-Vignon et al. (2022), suggested that modern Tajiks show genetic continuity with ancient samples from Tajikistan and Turkmenistan. The genetic ancestry of Tajiks consists largely of a West-Eurasian component (~74%), an East Asian-related component (~18%), and a South Asian component samplified by Great Andamanese (~8%). According to the authors, the South Asian (Great Andamanese) affinity of Tajiks was previously unreported, although evidence for the presence of a deep South Asian ancestry was already found previously in other Central Asian samples (eg. among modern Turkmens and historical Bactria–Margiana Archaeological Complex samples). Both historical and more