| Value | Category | Cases | |
|---|---|---|---|
| 1 | Always available | 442 |
79.1%
|
| 2 | Mostly available | 96 |
17.2%
|
| 3 | Sometimes available | 15 |
2.7%
|
| 4 | Rarely available | 6 |
1.1%
|
| Sysmiss | 1837 |