KAYUMBU RWANDA-OCT 12: Market day in the Giko Cell of Kayumbu Sector. Rwanda is the most densely populated country in Africa. There are an estimated 352 people per square kilometer. 35 percent of the population engage in subsistence agriculture and live under the poverty line. But with a growth rate of 6-8 percent since 2003 the poverty rate is declining. (Photo by William Campbell-Corbis via Getty Images)