The private sector's main areas of activity are agriculture and trading, with most private industrial investment predating 1980.
Industry mainly processes agricultural items.
Sluggish economic performance over the past decade, attributable largely to declining annual rainfall, has kept per capita income at low levels. A large foreign debt and huge arrearages continue to cause difficulties. In 1990 the International Monetary Fund took the unusual step of declaring Sudan noncooperative because of its nonpayment of arrearages to the Fund. After Sudan backtracked on promised reforms in 1992-93, the IMF threatened to expel Sudan from the Fund. To avoid expulsion, Khartoum agreed to make payments on its arrears to the Fund, liberalize exchange rates, and reduce subsidies, measures it has partially implemented.