The area around Suhl was settled during the later Middle Ages, nevertheless, Suhl stayed a village resp. small town of 1,000 to 2,000 inhabitants during this period. The growth of proto-industrial manufacturing businesses in 17th and 18th century led to a first increase of population up to 6,000 around 1800. During the following decades, the industrial revolution in other German regions led to an economic crisis in Suhl, because of the bad traffic conditions for exporting products. Nevertheless, the population grew further to 10,000 in the 1880s, as the city got finally connected to the railway. Compared to other upcoming cities in Germany, the growth of population stayed slight until 1935, as Suhl counted 15,000 inhabitants. Then, the arm production for World War II brought an economic boom to Suhl and a growth of population up to 26,000 in 1940, which stayed the same until the early 1960s. Between 1960 and 1988, the population grew up to 56,000, forced by the government's expansion of Suhl as a capital of one of the 14 Bezirks in GDR. After the reunification in 1990, the city lost its administrative and economic functions, which led to an extreme decline in population. It shrunk to 48,000 in 2000 and 36,000 in 2012. With a decline of more than 35% since 1988, Suhl is among the heaviest shrinking cities in Germany.