United States 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 Latest actual data: 2015 National accounts manual used: Other GDP valuation: Market prices. Real Gross Domestic Product determined by chained Fisher quantity growth rates. Start/end months of reporting year: January/December Base year: 2009 Chain-weighted: Yes, from 1980 Primary domestic currency: U.S. dollar Data last updated: 09/2016.