| Value | Category | Cases | |
|---|---|---|---|
| 1 | less than 1 year | 3 |
21.4%
|
| 2 | 1-3 years | 3 |
21.4%
|
| 3 | 3-5 years | 2 |
14.3%
|
| 4 | 5-10 years | 3 |
21.4%
|
| 5 | more than 10 years | 3 |
21.4%
|
| Sysmiss | 757 |