| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 156 |
2.9%
|
| 1 | Yes | 102 |
1.9%
|
| 8 | Don't know | 14 |
0.3%
|
| 9 | Not yet 9 months | 550 |
10.2%
|
| 99 | Not applicable | 4571 |
84.8%
|
| Sysmiss | 1 |