The gross domestic product (GDP) by expenditure based on gross fixed capital formation. Gross fixed capital formation is is measured by the total value of a producer's acquisitions, less disposals, of fixed assets during the accounting period plus certain additions to the value of non- produced assets (such as subsoil assets or major improvements in the quantity, quality or productivity of land) realised by the productive activity of institutional units. Expressed in constant 2015 United States dollars.