The Russian Census of 1817, which recorded 96,526 families and 482,630 inhabitants, did not register ethnic data except for recent refugees (primarily Bulgarians) and certain ethno-social categories (Jews, Armenians and Greeks). Official records indicated 3,826 Jewish families (4.2%), 1,200 Lipovan families (1.5%), 640 Greek families (0.7%), 530 Armenian families (0.6%), 482 Bulgarian and Gagauz families (0.5%). In the 20th century, Romanian historian Ion Nistor extrapolated the number of Romanians at 83,848 families (86%) and Ruthenians at 6,000 families (6.5%). The estimate was based on the assumption that Ruthenes constituted up to a third of the population of the Khotyn county, and the rest of the recorded population was exclusively Moldavian or Romanian. An alternative estimate for the same year indicates 76.4% Romanians, 8.7% Ukrainians, 5.1% Bulgarians and Gaguzes, 4.5% Jews and 2% Russians. An 1818 statistic of three counties in southern Bessarabia (Akkerman, Izmail and Bender) that had witnessed strong emigration of the Muslim population and immigration from other regions, including Ottoman lands south of the Danube, recorded a total population of 113,835. There are conflicting figures regarding the national distribution (first figure cited by Poștarencu, second by Ungureanu): 48.64/37% Moldavians, 7.07/8.9% Russians, 15.65/17.9% Ukrainians, 17.02/21.5% Bulgarians and 11.62/14.7% others. Still in 1818, statistics for the Khotyn county in northern Bessarabia indicated 47.5% Moldavians and 42.6% Ukrainians.