| Valeur | Modalité | Cas | |
|---|---|---|---|
| 3 | By phone | 4 |
0%
|
| 4 | By mail | 46 |
0.3%
|
| 5 | By internet | 226 |
1.4%
|
| 6 | By other means (tapes, sms...) | 41 |
0.3%
|
| Sysmiss | 15295 |