According to Siddharth Kara, trafficking researcher and board member of anti-trafficking organziation Free the Slaves, “the total revenue generated by the exploitation of all victims of human trafficking in 2007 was $58.6 billion, with profits of $39.7 billion.”

Source: Siddarth Kara, Sex Trafficking: Inside the Business of Modern Slavery, (New York: Colombia University Press, 2009) page 19.