the following: When the Soviet reconquered the area in 1944, they created the Moldavian Soviet Socialist Republic (with around half of the former MASSR included), where ethnic Romanians were the majority. Note: "-" means the official census data does not identify that group in that year, i.e. counts it within other groups, not that the group is not present. In the years of the latter half of the 20th century, the ethnic proportions have changed in large measure due to industrialization and the immigration of Russian and Ukrainian workers. During the Soviet rule, up to one million people settled in Moldova. In Transnistria, the trend continued after 1991, too, and the Moldovan population in decreased between 1989 and 2004 from 39% to 32% of the total population. In 2004, the Romanians were still the most numerous ethnic group, representing an overall majority in the two districts in the central Transnistria (Dubăsari District, 50.15%, and Grigoriopol District, 64.83%), a 47.82% relative majority in the northern Camenca District, and a 41.52% relative majority in the southern (Slobozia District). In Rîbniţa District they are a 29.90% minority, and in the city of Tiraspol, they constitute a 15.24% minority of the population. Russians were the second numerous ethnic group, representing a 41.64% relative majority in the city of Tiraspol, a 24.07% minority in Slobozia, a 19.03% minority in Dubăsari, a 17.22% minority in Râbniţa, a 15.28% minority in Grigoriopol, and a 6.89% minority in Camenca. Ukrainians are the third numerous ethnic group, representing a 45.41% relative majority in the northern Rîbniţa District, a 42.55% minority in Camenca, a 32.97% minority in Tiraspol, a 28.29% minority in Dubăsari, a 23.42% minority in Slobozia, and a 17.36% minority in Grigoriopol. As of 2015, the Romanians are no longer the largest single group of the Transnistria region (being surpassed by the Russians). According to the last census in Transnistria (October 2015), the population of the region was 475,373, a 14.47% decrease from the figure recorded at the 2004 census. By ethnic composition, the population of Transnistria was distributed as follows: Russians - 29.1%, Romanians - 28.6%, Ukrainians - 22.9%, Bulgarians - 2.4%, Gagauzians - 1.1%, Belarusians - 0.5%, Transnistrian - 0.2%, other nationalities - 1.4%. About 14% of the population did not declare their nationality. Also, for the first time, the population had the option to identify as "Transnistrian". According to the Moldovan Institute for Development and