For that indicator, The World Bank provides data for Angola from 1985 to 2017. The average value for Angola during that period was 21.81 percent with a minumum of 0 percent in 1985 and a maximum of 42.82 percent in 2009.
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The capital investment in Angola and other countries is calculated as the purchases of new plant and equipment by firms, as percent of GDP. A high number is good for long-term economic growth as current investment leads to greater future production.
Definition: Gross capital formation (formerly gross domestic investment) consists of outlays on additions to the fixed assets of the economy plus net changes in the level of inventories. Fixed assets include land improvements (fences, ditches, drains, and so on); plant, machinery, and equipment purchases; and the construction of roads, railways, and the like, including schools, offices, hospitals, private residential dwellings, and commercial and industrial buildings. Inventories are stocks of goods held by firms to meet temporary or unexpected fluctuations in production or sales, and "work in progress." According to the 1993 SNA, net acquisitions of valuables are also considered capital formation.