Table 4.
Percentage (%) of NHP in each type of the USDA and APV surveys
| Housing option |
||||
| 1 | 2 | 3 | 4 | |
| 2000–2001 USDA survey | 65.20 | 15.60 | 5.90 | 13.20 |
| 2014 APV survey | 84.35 | 3.79 | 11.83 | 0.03 |
Option 1 comprises both group-housed and pair-housed animals
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