and tobacco. The OECD says Africa has the potential to become an agricultural superbloc if it can unlock the wealth of the savannahs by allowing farmers to use their land as collateral for credit. There is such international interest in sub-Saharan agriculture, that the World Bank increased its financing of African agricultural programs to $1.3 billion in the 2011 fiscal year. Recently, there has been a trend to purchase large tracts of land in sub-Sahara for agricultural use by developing countries. Early in 2009, George Soros highlighted a new farmland buying frenzy caused by growing population, scarce water supplies and climate change. Chinese interests bought up large swathes of Senegal to supply it with sesame. Aggressive moves by China, South Korea, and Gulf states to buy vast tracts of agricultural land in sub-Saharan Africa could soon be limited by a new global international protocol. Education Forty percent of African scientists live in OECD countries, predominantly in Europe, the United States and Canada. This has been described as an African brain drain. According to Naledi Pandor, the South African Minister of Science and Technology, even with the drain enrollments in sub-Saharan African universities tripled between 1991 and 2005, expanding at an annual rate of 8.7%, which is one of the highest regional growth rates in the world. In the last 10 to 15 years interest in pursuing university-level degrees abroad has increased. According to the CIA, low global literacy rates are concentrated in sub-Saharan Africa, West Asia and South Asia. However, literacy rates in sub-Saharan Africa vary significantly between countries. The highest registered literacy rate in the region is in Zimbabwe (90.7%; 2003 est.), while the lowest literacy rate is in South Sudan (27%). Research on human capital formation was able to determine, that the numeracy levels of sub-Saharan Africa and Africa, in general, were higher than numeracy levels in South Asia. In the 1940s more than 75% of the population of sub-Saharan Africa was numerate. The numeracy of the West African countries, Benin and Ghana, was even higher with more than 80% of the population being numerate. In contrast, numeracy in South Asia was only around 50%. Sub-Saharan African countries that have higher diversity has been found to lead to a poorer economy. Researchers have argued that this is because of ethnic favoritism in their politics. Sub-Saharan leaders are more likely to provide better resources to their coethnic groups when