| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, always | 8 |
2.8%
|
| 2 | Yes, when item is out of stock | 28 |
10%
|
| 3 | No | 215 |
76.5%
|
| 4 | Not applicable | 30 |
10.7%
|
| Sysmiss | 9 |