| Characteristic | H1 2013 | H1 2014 |
|---|---|---|
| - | - | - |
| - | - | - |
| - | - | - |
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Sources
Release date
August 2014
Region
United States
Survey time period
H1 2013 and H1 2014
Supplementary notes
H1 2013: 390 magazines reporting comparable figures.
H1 2014: 397 magazines reporting comparable figures.
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