| Characteristic | Market size in billion U.S. dollars |
|---|---|
| - | - |
| - | - |
| - | - |
| - | - |
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Source
Release date
June 2016
Region
Worldwide
Survey time period
2015
Supplementary notes
* Translation, localization, interpretation etc.
** All mediums and all other languages combined.
*** Classroom and print combined.
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