| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 year or less than | 10 |
23.8%
|
| 2 | 1 to 5 years | 18 |
42.9%
|
| 3 | More than 5 years | 14 |
33.3%
|
| Sysmiss | 958 |