Recently, The Nation had a story that reported that Thailand ranked “20th in the World Slavery Index.”
There are now plenty of indices of country ranks for all kinds of things, and the Global Slavery Index is relatively recent on the scene.
In fact, Thailand ranked 16th of 167 countries for the absolute number of slaves, ranking between Sudan and Ethiopia. On the measure of slaves as a proportion of the population, Thailand ranked 20th.
Data for Thailand’s ranking can be viewed and the country report is also available.In that report, most attention is given to “forced labour in the Thai fishing industry (on both the seafaring and processing sides)…”. (In his Shangri-La Dialogue 2016 Keynote Address, The Dictator referred to human trafficking and irregular migration.)
The full global report can be downloaded.