| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, always | 6 |
2.4%
|
| 2 | Yes, when item is out of stock | 20 |
8%
|
| 3 | No | 203 |
81.5%
|
| 4 | Not applicable | 20 |
8%
|
| Sysmiss | 62 |