| Valor | Categoría | Casos | |
|---|---|---|---|
| 1 | INCONTEC | 12 |
6.1%
|
| 2 | BUREAU VERITAS | 102 |
51.5%
|
| 3 | SGS | 41 |
20.7%
|
| 4 | OTRO | 43 |
21.7%
|
| Sysmiss | 3542 |