| Value | Category | Cases | |
|---|---|---|---|
| 1 | One month | 27 |
6.6%
|
| 2 | Two months | 21 |
5.1%
|
| 3 | Three months | 11 |
2.7%
|
| 4 | Four months | 11 |
2.7%
|
| 5 | Five months | 5 |
1.2%
|
| 6 | Half a year | 13 |
3.2%
|
| 7 | More than half a year | 34 |
8.3%
|
| 8 | 1 year | 50 |
12.1%
|
| 9 | 2 years | 65 |
15.8%
|
| 10 | 3 years | 37 |
9%
|
| 11 | More than 3 years | 138 |
33.5%
|
| Sysmiss | 17539 |