| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than a year | 702 |
33%
|
| 2 | 1 year to less than 3 years | 1059 |
49.7%
|
| 3 | 3 years or more | 355 |
16.7%
|
| 9 | Unspecified | 13 |
0.6%
|
| Sysmiss | 63314 |