| Characteristic | Spending in billion U.S. dollars |
|---|---|
| - | - |
| - | - |
| - | - |
| - | - |
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Sources
Release date
January 2016
Region
Worldwide
Survey time period
2011 to 2014
Special properties
measured media only
Supplementary notes
Figures have been rounded.
Figures for 2011 and 2012 come from earlier publications.
See the report's methodology .
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