Ilo's report finds illegal gain from forced labour of about 21 million people amounts to three times more than prior estimates.(...)

The Report:
http://www.ilo.org/global/topics/forced-labour/publications/profits-of-forced-labour-2014/lang--en/index.htm

Past... present:
http://www.fabiomanzione.it/index.php?option=com_content&view=article&id=6617:experts-at-ilo-discuss-measures-to-strengthen-standard-setting-for-combating-forced-labour&catid=46:diritti-umani&Itemid=105