| Characteristic | 2015-2016 | 2016-2017 | 2017-2018 | 2018-2019 |
|---|---|---|---|---|
| - | - | - | - | - |
| - | - | - | - | - |
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Source
Release date
January 2020
Region
United States
Survey time period
2016 to 2018
Supplementary notes
Data for years prior to 2018 and 2019 comes from previous reports.
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