According to the 2011 Romanian census, Romania's population was 20,121,641. Like other countries in the region, its population is expected to decline gradually as a result of sub-replacement fertility rates and negative net migration rate. In October 2011, Romanians made up 88.9% of the population. The largest ethnic minorities are the Hungarians, 6.1% of the population, and the Roma, 3.0% of the population. The Roma minority is usually underestimated in census data and may represent up to 10% of the population. Hungarians constitute a majority in the counties of Harghita and Covasna. Other minorities include Ukrainians, Germans, Turks, Lipovans, Aromanians, Tatars, and Serbs. In 1930, there were 745,421 Germans living in Romania, but only about 36,000 remained in the country to this day. , there were also approximately 133,000 immigrants living in Romania, primarily from Moldova and China.