Brunei Darussalam Total Investment, % of GDP. Units: Percent of GDP. Multiplier: . Estimates begin after 2015 . This data is sourced from www.opendataforafrica.org where it is offered under an open data licence (www.opendataforafrica.org/legal/termsofuse). Expressed as a ratio of total investment in current local currency and GDP in current local currency. Investment or gross capital formation is measured by the total value of the gross fixed capital formation and changes in inventories and acquisitions less disposals of valuables for a unit or sector. [SNA 1993] Source: National Statistics Office. Department of Economic Planning and Development, Prime Minister's office. Latest actual data: 2015 National accounts manual used: SNA 1993 GDP valuation: Market prices Start/end months of reporting year: January/December Base year: 2010 Chain-weighted: No Primary domestic currency: Brunei dollar Data last updated: 07/2016.