The government regulates the immigration of foreign labor out of concern it might disrupt Brunei's society. Work permits for foreigners are issued only for periods of 2 years or less and must be repeatedly renewed. Despite these restrictions, the estimated 100,000 foreign temporary residents of Brunei make up a significant portion of the work force. The government reported an estimated work force of 198,800 in 2010, with a derived unemployment rate of 2.7% (2010 Brunei Darussalam Key Indicators--BDKI).