It is accepted that 50 percent of this size is due to the activities of the companies providing direct logistics services and the other 50 percent is caused by the logistics activities carried out by the companies that trade goods.
Et gëtt ugeholl datt 50 Prozent vun dëser Gréisst ass wéinst den Aktivitéite vun de Firmen, déi direkt Logistik Servicer ubidden, an déi aner 50 Prozent ginn duerch d'Logistikaktivitéite verursaacht vun de Firmen, déi Gidderhandel hunn.