
| Characteristic | Desktop | Smartphone | Tablet |
|---|---|---|---|
| - | - | - | - |
| - | - | - | - |
| - | - | - | - |
| - | - | - | - |
| - | - | - | - |
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Source
Release date
March 2017
Region
United States
Survey time period
December 2010 to December 2016
Supplementary notes
December 2010 data was taken from a previous publication.
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