Nigeria 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. Official re-based (2010) data for 2010-13 was published in July 2014, based on SNA 2008. Official backcasted data were published in July 2016 and 1990-2009 nominal and real GDP numbers were updated. However expenditure components of GDP are still IMF staf Latest actual data: 2015 Notes: Official backcasted data were published in July 2016 and 1990-2009 nominal and real GDP numbers were updated. However expenditure components of GDP are still IMF staff estimates and are subject to revision with official backcasted data. National accounts manual used: System of National Accounts (SNA) 2008 GDP valuation: Market prices Start/end months of reporting year: January/December Base year: 2010. from October WEO submission Chain-weighted: No Primary domestic currency: Nigerian naira Data last updated: 09/2016.