While historically agriculture remains the main source of income and employment hiring of over 80 percent of Sudanese, and makes up a third of the economic sector, oil production drove most of Sudan's post-2000 growth. Currently, the International Monetary Fund (IMF) is working hand in hand with Khartoum government to implement sound macroeconomic policies. This follows a turbulent period in the 1980s when debt-ridden Sudan's relations with the IMF and World Bank soured, culminating in its eventual suspension from the IMF. The program has been in place since the early 1990s, and also work-out exchange rate and reserve of foreign exchange. Since 1997, Sudan has been implementing the macroeconomic reforms recommended by the International Monetary Fund.