According to the International Labor Organization (ILO), forced labor alone (one component of human trafficking) generates an estimated $150 billion in profits annually; according to a 2014 ILO estimate, 21 million victims are trapped in modern slavery. Ethnic minorities and highly marginalized groups of people are estimated to work in some of the most exploitative and harmful sectors, such as leather tanning, mining, and quarrying. The poster depicts a piggy bank without a hole to save money. This cannot be done when a person is a slave.