| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | less than one year at level | 8 |
5.5%
|
| 1 | 4 |
2.8%
|
|
| 2 | 21 |
14.5%
|
|
| 3 | 32 |
22.1%
|
|
| 4 | 17 |
11.7%
|
|
| 5 | 18 |
12.4%
|
|
| 6 | 17 |
11.7%
|
|
| 7 | 28 |
19.3%
|