| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 4 |
0.7%
|
| 1 | Yes | 179 |
30%
|
| 2 | No, but expect to receive them in the next 3 months | 27 |
4.5%
|
| 3 | No | 387 |
64.8%
|
| Sysmiss | 104 |