How many percentage points higher was the male literacy rate than the female in 2001?
return males ;return females ;return literacy rates in  percentage of #1 ;return literacy rates in  percentage of #2 ;return #3 in  2001 ;return #4 in  2001 ;return the  difference of #5 and  #6
['select', 'select', 'project', 'project', 'filter', 'filter', 'arithmetic']