| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, always | 12 |
5.5%
|
| 2 | Yes, when item is out of stock | 9 |
4.1%
|
| 3 | No | 177 |
80.8%
|
| 4 | Not applicable | 21 |
9.6%
|
| Sysmiss | 81 |