| Characteristic | 2016 | 2017* | 2018* |
|---|---|---|---|
| - | - | - | - |
| - | - | - | - |
| - | - | - | - |
| - | - | - | - |
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Sources
Release date
April 2017
Region
North America
Survey time period
April 2017
Supplementary notes
*Forecast.
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