This is old but interesting. From the Brookings Institute.
Poverty in Numbers: The Changing State of Global Poverty from 2005 to 2015
“Whereas it took 25 years to reduce poverty by half a billion people up to 2005, the same feat was likely achieved in the six years between then and now. Never before have so many people been lifted out of poverty over such a brief period of time,” the authors wrote in the Yale Global Online Magazine.
Poverty in Numbers: The Changing State of Global Poverty from 2005 to 2015