This was a contributory factor to falling birth rates. Births dropped from 7,000 in 1988 to less than 3,000 in 1994. However, the number of children born in Leipzig has risen since the late 1990s. In 2011, it reached 5,490 births resulting in a RNI of −17.7 (−393.7 in 1995). The unemployment rate decreased from 18.2% in 2003 to 9.8% in 2014 and 7.6% in June 2017. The percentage of the population from an immigrant background is low compared with other German cities. , only 5.6% of the population were foreigners, compared to the German national average of 7.7%. The number of people with an immigrant background (immigrants and their children) grew from 49,323 in 2012 to 77,559 in 2016, making them 13.3% of the city's population (Leipzig's population 579,530 in 2016). The largest minorities (first and second generation) in Leipzig by country of origin as of 31.12.2018 are:  The historic central area of Leipzig features a Renaissance-style ensemble of buildings from the sixteenth century, including the old city hall in the marketplace. There are also several baroque period trading houses and former residences of rich merchants. As Leipzig grew considerably during the economic boom of the late-nineteenth century, the town has many buildings in the historicist style representative of the "Gründerzeit" era. Approximately 35% of Leipzig's flats are in buildings of this type. The new city hall, completed in 1905, is built in the same style. Some 64,000 apartments in Leipzig were built in Plattenbau buildings during Communist rule in East Germany. and although some of these have been demolished and the numbers living in this type of accommodation have declined in recent years, at least 10% of Leipzig's population (50,000 people) are still living in Plattenbau accommodation. Grünau, for example, has approximately 40,000 people living in this sort of accommodation. The St. Paul's Church was destroyed by the Communist government in 1968 to make room for a new main building for the university. After some debate, the city decided to establish a new, mainly secular building at the same location, called Paulinum, which was completed in 2012. Its architecture alludes to the look of the former church and it includes space for religious use by the faculty of theology, including the original altar from the old church and two newly built organs.