This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionModern incidence of slavery.png
English: Modern incidence of slavery, as a percentage of the population, by country: en:Global Slavery Index. Color values are based on median estimates rounded to the nearest 0.05%. Data from Sudan does not account for the independence of South Sudan, and will differ depending on if slavery was concentrated in the north or the south. Estimates by sources with a broader definition of slavery will be higher.
Date
Source
Reporting in the Washington Post,[1] verified in some cases with the original data at the Walk Free Foundation[2] (the Post got Benin and Togo reversed, also Guiana and French Guiana, and did not distinguish anything over 0.75%). WARNING: The illustrator of the Washington Post map was incompetent, and I have verified only a few countries. Other countries may have been misidentified. (Original data is posted on talk page for verification.)
This demographic map image could be re-created using vector graphics as an SVG file. This has several advantages; see Commons:Media for cleanup for more information. If an SVG form of this image is available, please upload it and afterwards replace this template with {{vector version available|new image name}}.
It is recommended to name the SVG file “Modern incidence of slavery.svg”—then the template Vector version available (or Vva) does not need the new image name parameter.
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.