Saltsjötorget and Stortorget were preserved. In 1960, Södertälje was still a fairly small town with a largely homogeneous population of 33,000 inhabitants. In the 1960s, however, the demographics of the city changed radically. The industrial boom and the structural transformation led to economic development and increased investments in the city's industries. The large companies Scania-Vabis and Astra were in high demand of labour. Recruitment was primarily made from parts of the country that were severely affected by the industrial boom, mainly Norrland. When the manpower from other parts of the country was insufficient, foreign labour was brought in. Most of the migrant workers came from Finland, but also Greece, Italy and Yugoslavia. During the 1970s, immigration from Finland declined, while many Christian Assyrians/Syriacs settled in Södertälje, mostly from Tur Abdin, Turkey. At the end of the 1990s, many Iraqis (the majority of which are ethnic Assyrians) arrived, and now Assyrians constitute the largest immigrant group. In total, about 39 percent of the city's population are first or second generation immigrants. In 2013, there were reports in the media that a parallel society founded by the Assyrian/Syriac minorities had emerged, with norms, rules and a banking system without control from society. Swedish law enforcement allocated extensive resources. A trial against the mafia-like organisation (English: The Södertälje network) ended in 2013. Construction of Almnäs garrison started in 1970. Svea Engineer Corps and the Engineering Troops Cadet School (INGKAS) relocated to Almnäs. They were joined by Swedint, the Armed Forces International training school, in 1984. During the 1990s, the Life Guards were also present at Almnäs. After 1996, the armed forces underwent a major reorganisation and left Almnäs altogether in 2004. The area is now a business park. Many of the city's modern attractions were built in the 1980s. A museum based on the book by French writer Arthur Good was built. The museum is called Tom Tits Experiment after the author's pen name Tom Tit. The new bath house opened in 1987, and is now one of the most visited bathing facilities in the country. During the 2010 and 2020 centuries, several infrastructure projects were completed or started. Further widening of the canal and the lock was initiated, as well as the upgrade of the railway around Södertälje Hamn railway station to increase capacity. Administrative history The City of Södertälje was transformed to a city municipality during the Swedish municipal reforms of