How many percentage points did those living in extreme poverty increase from 2011 to 2015?
return those living in  extreme poverty ;return #1 in  2011 ;return #1 in  2015 ;return percentage of #2 ;return percentage of #3 ;return the  difference of #5 and  #4
['select', 'filter', 'filter', 'project', 'project', 'arithmetic']