| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 6 months | 49 |
10%
|
| 2 | Between 6 months to 1 year | 30 |
6.1%
|
| 3 | Years | 75 |
15.3%
|
| 9 | Missing | 337 |
68.6%
|
| 98 | Not applicable | 0 |
0%
|
| Sysmiss | 8936 |