| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, always | 3 |
1.2%
|
| 2 | Yes, when item is out of stock | 24 |
9.3%
|
| 3 | No | 227 |
88%
|
| 4 | Not applicable | 4 |
1.6%
|
| Sysmiss | 50 |