| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 2 years | 422 |
33%
|
| 2 | 2 to 4 years | 506 |
39.6%
|
| 3 | More than 4 years | 351 |
27.4%
|
| 9 | Missing | 0 |
0%
|
| Sysmiss | 10871 |