| Value | Category | Cases | |
|---|---|---|---|
| 1 | Always available | 24851 |
80.2%
|
| 2 | Only once | 1538 |
5%
|
| 3 | More than once | 4599 |
14.8%
|
| 9 | MSISSING | 0 |
0%
|
| Sysmiss | 205 |