By the end of the 19th century, Batavia's population was 115,887 people; of these, 8,893 were Europeans, 26,817 were Chinese and 77,700 were indigenous islanders. The city's expanding commercial activity led to the immigration of large numbers of Dutch employees and rural Javanese to Batavia. The 1905 population of Batavia and its surrounding area reached 2.1 million, including 93,000 Chinese people, 14,000 Europeans, and 2,800 Arabs. This growth resulted in an increased demand for housing, and land prices soared. New houses were built close together, and kampung settlements filled spaces between the houses. Settlements, built with little regard for the region's tropical conditions, resulted in overcrowding, poor sanitation, and an absence of public amenities. Java had an outbreak of plague in 1913.