How much profit can human trafficking generate?

Human trafficking brings huge profits, given that one person can be exploited over and over again, during a longer period of time. A victim, like any other commodity, can be resold several times to different traffickers in different cities, states. Human traffickers place responsibility on the victims, making them stay in debt bondage, constantly owing them money, so that they are forced to pay it back at all costs. Human trafficking profits are also harvested by criminal organizations, but also individuals who work independently and traffic persons for profit and personal gain.