| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | were not taken | 0 |
0%
|
| 20 | 1 |
16.7%
|
|
| 60 | 1 |
16.7%
|
|
| 90 | 1 |
16.7%
|
|
| 120 | 1 |
16.7%
|
|
| 150 | 1 |
16.7%
|
|
| 180 | 1 |
16.7%
|
|
| 998 | don't know | 0 |
0%
|
| Sysmiss | 17653 |