"70% of Malawians live on less than $2.15 a day. Under the World Bank’s revised $3-a-day poverty line, it’s 75%."

This sounds like an extremely bimodal distribution -- a 40% increase in the cut-off line only captures 5% more of the population, so only a small number of people are in this "poor but survivable" zone, with most well under and some well over, I assume. Does this map to the usual rural/urban divide?