| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Yes | 8 |
1.5%
|
| 2 | No, but expect to receive them in the next 3 months | 5 |
0.9%
|
| 3 | No | 520 |
97.6%
|
| Sysmiss | 68 |