| Characteristic | Number of models |
|---|---|
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
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Source
Release date
May 2017
Region
United States
Survey time period
2015
Supplementary notes
The values have been added up.
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