| Characteristic | Revenue in billion U.S. dollars |
|---|---|
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
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Sources
Release date
September 2014
Region
United States
Survey time period
2012 to 2013
Supplementary notes
Annual subscription estimates.
*200 to 600 million.
**4 to 5 million.
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