shortage of housing for a growing population of the city, large scale Microdistricts (so-called sleeping districts) were built in the elderates of Antakalnis, Žirmūnai, Lazdynai, Karoliniškės, Viršuliškės, Baltupiai, Šeškinė, Justiniškės, Pašilaičiai, Fabijoniškės and on a smaller scale in other parts of Vilnius. These were connected with the central part as well as with industrial areas via expressway-like streets (so-called fast traffic streets) and by public transport, noticeably extensive network of trolleybuses (from 1956). Independent Lithuania On 11 March 1990, the Supreme Council of the Lithuanian SSR announced its secession from the Soviet Union and intention to restore an independent Republic of Lithuania. As a result of these declarations, on 9 January 1991, the Soviet Union sent in troops. This culminated in the 13 January attack on the State Radio and Television Building and the Vilnius TV Tower, killing at least fourteen civilians and seriously injuring 700 more. The Soviet Union finally recognised Lithuanian independence in September 1991. The Constitution, as did the earlier Lithuanian Constitution of 1922, mentions that "the capital of the State of Lithuania shall be the city of Vilnius, the long-standing historical capital of Lithuania". Vilnius has been rapidly transforming, emerging as a modern European city. The majority of its historical buildings during the last 25 years had been renovated, and a business and commercial area is being developed into the New City Centre, that is expected to become the city's main administrative and business district on the north side of the Neris river. This area includes modern residential and retail space, with the municipality building and the Europa Tower as its most prominent buildings. The construction of Swedbank's headquarters is symbolic of the importance of Scandinavian banks in Vilnius. The building complex Vilnius Business Harbour was built in 2008, and one of its towers is now the 6th tallest building in Lithuania. More buildings are scheduled for construction in the area. More than 75,000 new flats were built between 1995 and 2018 (including almost 50,000 new flats between 2003 and 2018), making Vilnius an absolute leader in construction sector in the Baltics of the last two decades. On average, or 3,246 flats are built each year. In 2015, there were 225,871 units in multi-storey houses and 20,578 flats in single-family or duplex apartment houses, the share of such housing increasing from 6.9% in 2006 to 8.3% in 2015. The record numbers of flats were built in