| Characteristic | 2011 | 2012 | 2014 | 2015 | 2016 | 2017 |
|---|---|---|---|---|---|---|
| - | - | - | - | - | - | - |
| - | - | - | - | - | - | - |
| - | - | - | - | - | - | - |
| - | - | - | - | - | - | - |
| - | - | - | - | - | - | - |
| - | - | - | - | - | - | - |
| - | - | - | - | - | - | - |
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Source
Release date
April 2018
Region
United States
Survey time period
2011 to 2017
Special properties
estimates
Supplementary notes
Figures for periods prior to 2017 come from previous reporting.
Data for 2013 not available.
Citation formats









