| Value | Category | Cases | |
|---|---|---|---|
| 1 | Always available | 1191 |
20.8%
|
| 2 | Mostly available | 2889 |
50.5%
|
| 3 | Sometimes available | 1157 |
20.2%
|
| 4 | Rarely available | 479 |
8.4%
|
| Sysmiss | 45638 |