| value | category | cases | |
|---|---|---|---|
| 1 | Less than 12 months | 102 |
43.4%
|
| 2 | 12-23 months | 56 |
23.8%
|
| 3 | 2 years or more | 77 |
32.8%
|
| 9 | 2 | ||
| Sysmiss | 3368 |