Passage: In April 2016, South Korea's population was estimated to be around 50.8 million by National Statistical Office, with continuing decline of working age population and total fertility rate. The country is noted for its population density, which was an estimated 505 per square kilometer in 2015, more than 10 times the global average. Most South Koreans live in urban areas, because of rapid migration from the countryside during the country's quick economic expansion in the 1970s, 1980s and 1990s. The capital city of Seoul is also the country's largest city and chief industrial center. According to the 2005 census, Seoul had a population of 10 million inhabitants. The Seoul National Capital Area has 24.5 million inhabitants (about half of South Korea's entire population) making it the world's second largest metropolitan area. Other major cities include Busan (3.5 million), Incheon (3.0 million), Daegu (2.5 million), Daejeon (1.4 million), Gwangju (1.4 million) and Ulsan (1.1 million).

Question: How many millions of people lived in Ulsan?
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