Austro-Hungarian, Serbian and Russian-born. By the 1926 census, there had been 253,000 refugees with granted households and land or citizenship but with many more in towns of uncertain number. 35% came from Eastern Thrace, 30% came from Greek Macedonia, another 18% from Western Thrace, 8% from Dobruja, 4% from the Western Outlands, 3% from Asia Minor, and 2% from North Macedonia. They constituted 6% of the country's population. In 1940, 70,000 Bulgarians were exchanged from Northern Dobruja. The total number of refugees in 1878-1940 is estimated at between 700,000 and 1,200,000. According to the 2011 census Russian citizens are the most numerous foreigners - 11 991, followed by 8 444 EU citizens (UK- 2 605, Greece - 1 253, Germany- 848, Poland - 819 and Italy - 456), citizens of Ukraine - 3 064, North Macedonia - 1 091, Moldova - 893 and Serbia - 569. 22.8% of them are from Asia, mostly from Turkey. Those with dual Bulgarian and other citizenship were 22 152, or 0.3% of the population. Of them persons with Bulgarian and Russian citizenship were 5 257 (23.7%), followed by persons with Bulgarian and Turkish citizenship - 4 282 (19.3%), Bulgarian and citizenship of the USA- 1 725 (7.8%). There are at least 17,527 Refugees of the Syrian Civil War with applications in Bulgaria. In 2001-2015 185,447 people applied for Bulgarian citizenship and 116,222 were provided with. 113,647 were granted on grounds of proven Bulgarian ancestry, including 59,968 North Macedonia citizens. 29,218 were Moldovan citizens, 5930 Ukrainians, 5374 Serbians, 5194 Russians, 3840 Israeli, 2192 Albanians, 692 Turks and others. In 2016, 12,880 foreigners were naturalized, including 6196 Macedonians. Population by country of birth: Foreigners by nationality: Age structure 0–14 years: 13.2% 15–65 years: 68.3% 65 years and over: 18.5% (Census 2011) At the 2011 census the largest decadal age group of the identified as Romani people is the 0–9 years old or 21% of them, the same age group accounted for 10% of the Turks and 7% of the Bulgarians. Experts estimate that the Romani in some provinces make up 40% of all aged between 0 and 9 years. Amongst those who did not answer the question on ethnic group lowest is the share of people aged 60+ years. Bulgarian children constitute the majority of all children in 23 out of 28 provinces. They constitute more than ninety percent of all children in two provinces: Sofia