What Could you buy with 17000 Toman in Different Years?

Although described as an (interbank) "market rate", the value of the Iranian rial is tightly controlled by the central bank. The state ownership of oil export earnings and its large reserves, supervision of letters of credit, together with the current – and capital outflow account – outflows allows management of demand. The central bank has allowed the rial to weaken in nominal terms (4.6% on average in 2009) in order to support the competitiveness of non-oil exports.