| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 3 |
3.6%
|
| 1 | Yes | 18 |
21.4%
|
| 2 | No, but expect to receive them in the next 3 months | 4 |
4.8%
|
| 3 | No | 59 |
70.2%
|
| Sysmiss | 275 |