| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than one month | 122 |
33.7%
|
| 2 | 1-2 months | 100 |
27.6%
|
| 3 | 2-6 months | 72 |
19.9%
|
| 4 | more than 6 months | 11 |
3%
|
| 5 | 6-12 months | 14 |
3.9%
|
| 6 | 1-2 years | 20 |
5.5%
|
| 7 | more than 2 years | 21 |
5.8%
|
| 8 | more than 10 years | 1 |
0.3%
|
| 9 | 1 |
0.3%
|
|
| Sysmiss | 455 |