How many of the Central Americans living abroad in 2005 were not Costa Ricans?
return Central Americans ;return #1 that were living abroad ;return #2 in  2005 ;return #3 that were Costa Ricans ;return number of  #3 ;return number of  #4 ;return the  difference of #5 and  #6
['select', 'filter', 'filter', 'filter', 'aggregate', 'aggregate', 'arithmetic']