Para este indicador, El Banco Mundial proporciona datos para Irán desde 1960 a 2017. El valor medio para Irán durante ese período fue de 34.71 por ciento con un mínimo de 17.13 por ciento en 1988 y un máximo de 48.43 por ciento en 1977.
Definición: 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.