| Value | Category | Cases | |
|---|---|---|---|
| 1 | Always | 2439 |
89.1%
|
| 2 | Mostly available | 259 |
9.5%
|
| 3 | Sometimes available | 37 |
1.4%
|
| 4 | Rarely available | 2 |
0.1%
|
| Sysmiss | 78 |