| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Less than 6 months | 445 |
12.9%
|
| 2 | 2. Less than 1 year | 607 |
17.6%
|
| 3 | 3. Less than 2 years | 638 |
18.5%
|
| 4 | 4. 2 to 3 years | 511 |
14.8%
|
| 5 | 5. More than 3 years | 1242 |
36.1%
|
| Sysmiss | 966 |