For the purposes of description and analysis, it can be useful to show for some product groups the relative size of the transfer of existing goods separately, e. g. the importance of second-hand cars or the importance of recycled paper.
Za opise in analize je morda koristno, da se za določene skupine proizvodov posebej prikažejo relativne velikosti transferjev obstoječega blaga, npr. pomen rabljenih vozil ali recikliranega papirja.