| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than a year | 587 |
28.8%
|
| 2 | 1 year to less than 3 years | 1068 |
52.5%
|
| 3 | 3 years or more | 360 |
17.7%
|
| 9 | Unspecified | 20 |
1%
|
| Sysmiss | 65940 |