| Value | Category | Cases | |
|---|---|---|---|
| 1 | < 1 month | 1 |
0.5%
|
| 2 | 1 month | 5 |
2.4%
|
| 3 | 2 months | 1 |
0.5%
|
| 4 | 3 months | 9 |
4.3%
|
| 5 | 4 months | 3 |
1.4%
|
| 6 | 5 months | 1 |
0.5%
|
| 7 | 6 months | 189 |
90.4%
|
| Sysmiss | 111 |