| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 month | 87 |
3.5%
|
| 2 | 1 to 2 months | 137 |
5.6%
|
| 3 | 3 to 6 months | 296 |
12.1%
|
| 4 | 7 to 11 months | 187 |
7.6%
|
| 5 | 1-2 years | 557 |
22.7%
|
| 6 | 3 or more years | 1189 |
48.5%
|
| Sysmiss | 44736 |