A good reference to visualize and compare the data available about modern slavery, human trafficking, forced labor and child labor on the global, regional and national levels via the list of Target 8.7 of the United Nations Sustainable Development Goals (SDGs) Data Dashboards HERE.
Note, currently there are dashboards for 147 countries (highlighted in orange on the map above) but many dashboards lack nationally representative data available on human trafficking (under Measurements tab).