| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 month | 110 |
7.1%
|
| 2 | 1-2 months | 253 |
16.3%
|
| 3 | 3-5 months | 274 |
17.7%
|
| 4 | 6-11 months | 252 |
16.2%
|
| 5 | 1-2 years | 351 |
22.6%
|
| 6 | 3 years or more | 312 |
20.1%
|
| Sysmiss | 42688 |