How many more percentage points of Bergens residents were immigrants of Western background compared to immigrants of non-Western background?
return Bergens residents ;return #1 that were immigrants  of   Western background ;return #1 that were immigrants  of   non-Western background ;return percentage of   #2 ;return percentage of   #3 ;return the  difference of   #4 and  #5
['select', 'filter', 'filter', 'project', 'project', 'arithmetic']