| Value | Category | Cases | |
|---|---|---|---|
| 1 | Always available | 2880 |
57.5%
|
| 2 | Mostly available | 1579 |
31.5%
|
| 3 | Sometimes available | 432 |
8.6%
|
| 4 | Rarely available | 116 |
2.3%
|
| Sysmiss | 149 |