| Value | Category | Cases | |
|---|---|---|---|
| 1 | up to one month | 17 |
44.7%
|
| 2 | 2 months | 6 |
15.8%
|
| 3 | 3 months | 9 |
23.7%
|
| 4 | 4 months | 2 |
5.3%
|
| 5 | 5 months | 1 |
2.6%
|
| 6 | 6 months | 0 |
0%
|
| 7 | 7 months and more | 3 |
7.9%
|