| Value | Category | Cases | |
|---|---|---|---|
| 1 | Always available | 222 |
51.5%
|
| 2 | Mostly available | 145 |
33.6%
|
| 3 | Sometimes available | 43 |
10%
|
| 4 | Rarely available | 21 |
4.9%
|
| Sysmiss | 3270 |