Brunei Darussalam, located on the north-west coast of Borneo, has a total area of 5765 km(2) (1). Divided into four districts - Brunei-Muara, Belait, Temburong and Tutong with the majority of the population living in the Brunei-Muara District, approximately 74% of the population is urban with an overall population of 390 000, male/female ratio 1.13 : 1 (2). The main ethnic group is Malay (66.6%), which comprises the different Brunei indigenous communities of Malay, Belait, Bisaya, Brunei, Dusun, Kedayan, Murut and Tutong. Chinese ethnicity comprises 11% while other undefined ethnicities 22.4%. Approximately, 39.2% are aged below 19 years, 2.8% over 65 years with a median age of 26 years. Brunei's gross national income per capita (PPP international dollars) is 49,900 (3).