| Value | Category | Cases | |
|---|---|---|---|
| 1 | less than 12 months | 2169 |
21.8%
|
| 2 | 12-23 months | 1638 |
16.5%
|
| 3 | 2 years or more | 6124 |
61.7%
|
| Sysmiss | 25852 |